The range of minimum average temperatures for zone 13 is between 60°F and 70°F or +15.6°C and +21.1°C. Vigorous, Hibiscus coccineus (Scarlet Rose Mallow) is a woody-based perennial noted for its 5-petaled, bright crimson red flowers, up to 3-5 in. Considered the standard measure of plant hardiness, the USDA Plant Hardiness Zone Map is based on average annual minimum winter temperatures. There is a very small spot east of San Juan, Puerto Rico that includes the airport in coastal Carolina, where the mean minimum is 67 degrees F (19 C), which is classified as hardiness Zone 13b, the highest category, with temperatures rarely below 65 °F (18 °C). Hardiness Zone 11 - Landscaping Ideas | YardShare.com YardShare The map is divided into thirteen distinct 10ºF zones, which are further divided into sub-zones of 5°F. Based on the USDA Hardiness Zone Map, this interactive version covers the country of Turkey which ranges from Zone 2a to Zone 12a. Shop; Specials; About; Resources; Contact Us; Gift Cards; Sign Up For Our Newsletter; ‹ Continue Shopping Secure Checkout [32], Geographical regions defined by climatic conditions for horticultural purposes. Their map purported to show finer detail, for example, reflecting urban heat islands by showing the downtown areas of several cities (e.g., Baltimore, Maryland; Washington, D.C. and Atlantic City, New Jersey) as a full zone warmer than outlying areas. Hawaii Interactive 1990 USDA Hardiness Zone Map. Even the extreme minimum itself may not be useful when comparing regions in widely different climate zones. Perfect on trellis, cascading over…, Free-flowering, Triteleia ixioides 'Starlight' is a cormous perennial boasting loose umbels, 5 in. An extreme example of a cold sink is Funtensee, Bavaria which is at least in zone 3 and maybe even in zone 1 or 2. Central Europe is a good example of a transition from an oceanic climate to a continental climate, which reflects in the tendency of the hardiness zones to decrease mainly eastwards instead of northwards. In this method, common plants with known limits to their range are used. [21] The cooler UK summers must be considered. Gardenia plants usually grow from. Latvia's capital Riga is in zone 6a. [citation needed], Sunset publishes a series that breaks up climate zones more finely than the USDA zones, identifying 45 distinct zones in the US, incorporating ranges of temperatures in all seasons, precipitation, wind patterns, elevation, and length and structure of the growing season. This extremely warm zone features mellow winters with an average minimum winter temperature of between 40 to 50 degrees F. Cold hardiness is not a factor in this zone, since it has zero frost days. [15] They are numerically about 6 lower than the USDA system. The USDA released updated Plant Hardiness Zone … In 2003, the American Horticultural Society (AHS) produced a draft revised map, using temperature data collected from July 1986 to March 2002. However, in warm climates (zones 8-11) with hot, dry summers, paperwhite bulbs can be planted outside where they will bloom annually for many years. It has been adapted by and to other countries (such as Canada) in various forms. Suitability Map for the Probable Winter Survival of Ornamental Trees and Shrubs", "United Kingdom Plant Hardiness Zone Map", "Denmark Interactive Plant Hardiness Zone Map", "Map of Albanian plant hardiness zones based on the WorldClim data for the 1950-2000 period", "Climatic hardiness and heat zones of Albania and their use in evaluating the potential of introducing new plant species", "LAS PLANTAS ORNAMENTALES Y SUS ZONAS DE RUSTICIDAD EN ESPAÑA", "Weather and Climate: The Climate of Sarajevo", "Projected changes in cold hardiness zones and suitable overwinter ranges of perennial crops over the United States", Hardiness Zone maps for several continents, Interactive USDA Plant Hardiness Zone Map, Plant Hardiness Zones of Canada – Interactive Map, https://en.wikipedia.org/w/index.php?title=Hardiness_zone&oldid=1010499505, Short description is different from Wikidata, Articles with unsourced statements from July 2016, Articles with unsourced statements from August 2019, Articles with unsourced statements from January 2021, Articles needing additional references from September 2020, All articles needing additional references, Wikipedia external links cleanup from October 2012, Creative Commons Attribution-ShareAlike License, X₁ = monthly mean of the daily minimum temperatures (°C) of the coldest month, X₂ = mean frost free period above 0 °C in days, X₃ = amount of rainfall (R) from June to November, inclusive, in terms of R/(R+a) where a=25.4 if R is in millimeters and a=1 if R is in inches, X₄ = monthly mean of the daily maximum temperatures (°C) of the warmest month, X₅ = winter factor expressed in terms of (0 °C – X₁)Rjan where Rjan represents the rainfall in January expressed in mm, X₆ = mean maximum snow depth in terms of S/(S+a) where a=25.4 if S is in millimeters and a=1 if S is in inches. The hardiness scales do not take into account the reliability of snow cover in the colder zones. The 2012 USDA Plant Hardiness Zone Map is the standard by which gardeners and growers can determine which plants are most likely to thrive at a location. See more ideas about plant hardiness zone, plants, zone 11. The warmer zones of the US, including zones 8, 10, 11, are in the southern half of the country and also the lower Pacific and Atlantic Coast while the cooler zones which include zones between 7 and 4 are on the northern and central parts of the country. [14] The Trewartha climate classification is often a good "real world" concept of climates and their relation to plants and their average growing conditions. Also, the plateaus and low mountain ranges in this region have a significant impact on how cold it might get during winter. [8] Research in 2016 suggests that USDA plant hardiness zones will shift even further northward under climate change. Just click on the picture to see the full-size map. Mount Isa has three climatic stations with more than a ten-year record. Select Page. As an example, Quebec City in Canada is located in zone 4, but can rely on a significant snow cover every year, making it possible to cultivate plants normally rated for zones 5 or 6. Plant name: Filter. State-by-state maps, along with an electronic system that allows finding the zone for a particular zip code, can be found at the USDA Agricultural Research Service (USDA-ARS) website. The hardiness of a plant is largely measured by how well it can withstand cold winter temperatures, so something that can survive the minimum temperature in Zone 5 would find Zone … Hardiness zones Hardiness Zone. The foliage of long, grasslike, basal bright green leaves emerges in late winter and dies back as the flowers appear. Hardiness.zone. One is in zone 4a, one in zone 4b, and the other is in zone 5a. What is a Hardiness Zone? Sydney residents are split between zones 3a and 4b. Most of England, Wales and Scotland, parts of central Ireland, and, Most of western and southern England and Wales, western Scotland, also a very narrow coastal fringe on the east coast of Scotland and northeast England (within 5 km (3.1 mi) of the, Very low-lying coastal areas of the southwest of Ireland and the, This page was last edited on 5 March 2021, at 20:11. Many plants may survive in a locality but will not flower if the day length is insufficient or if they require vernalization (a particular duration of low temperature). Kiruna is the major exception here, which being located on a hill above frost traps, is in zone 5. The higher Australian zone numbers had no US equivalents prior to the 2012 addition by USDA of zones 12 and 13. Carolina, Puerto Rico has the warmest hardiness zone in the United States at 13b. Conversely, Fort Yukon, Alaska has the coldest hardiness zone for any city in the United States at 1a. The islands of Malta, Lampedusa, a few areas on the southernmost coast of Cyprus all belong to zone 11a[citation needed]. Zone 6 covers the south of mainland Finland, Sweden north of 60°N, and the high plateau of Småland further south. The country is in zones 5a, 5b, 6a, 6b, 7a and 7b. View Videos or join the USDA Plant Hardiness Zone discussion. Another notable example is Waksmund, a small village in the Polish Carpathians, which regularly reaches −35 °C (−31 °F) during winter on calm nights when cold and heavy airmasses from the surrounding Gorce and Tatra Mountains descend down the slopes to this low-lying valley, creating extremes which can be up to 10 °C (18 °F) colder than nearby Nowy Targ or Białka Tatrzańska, which are both higher up in elevation. Below is a list of shrub names that normally succeed within zone eleven (11). woody • Europe • USDA 4 • 20 m • • ☆28 • Dryopteris filix-mas. The map has a higher resolution than previous ones, and is able to show local variations due to things such as elevation or large bodies of water. The Foundation also did away with the more detailed a/b half-zone delineations. If you are planning to buy a shrub, perennial or tree, you need to make sure that this new plant will tolerate year-round conditions in your area. Landscapers in our local area know that they could use a plant hardy to Zone 7 (-17.8C) without fear of it perishing in the winter cold. Higher zones can be found in Hawaii (up to 12) and Puerto Rico (up to 13). The map is based on the average annual minimum winter temperature, divided into 10-degree F zones. [21], In 2012 the United Kingdom's Royal Horticultural Society introduced new hardiness ratings for plants, from H7, the hardiest (tolerant of temperatures below −20 °C (−4 °F)) to H1a (needing temperatures above 15 °C (59 °F)). across (7-12 cm). Unless specifically noted, all zones in this section are USDA zones. X₇ = maximum wind gust in (km/hr) in 30 years. Based on the minimum ten-year average winter temperatures, plant hardiness zones maps have been progressively developed, first by the Department of Agriculture (USDA) for the United States and then more or less applied to the rest of the planet. The hardiness zones are developed by the Department of Agriculture in the United States. Blooming in late spring to early summer, the eye-catching flowers rise on long, slender stalks until the plant goes dormant in summer. In addition to the USDA Hardiness zones there are American Horticultural Society (AHS) heat zones. [8] The 2012 map was created digitally for the internet, and includes a ZIP Code zone finder and an interactive map.[9][10]. The criterion is the average number of days per year when the temperature exceeds 30 °C (86 °F). Here one will find cities such as Gävle, Örebro, Sundsvall, and Helsinki. The Spanish and Portuguese Atlantic coast, much of Andalusia and Murcia, coastal and slightly inland southern Valencian Community, a part of coastal Catalonia, the Balearic Islands, southwestern Sardinia, most of Sicily, coastal southern Italy, some areas around Albania,[24][25] coastal Cyprus and southwestern Greece are in zone 10. It used uniform 10-degree Fahrenheit ranges, and gradually became widespread among American gardeners.[3][4]. The Faroe Islands, at 62–63°N are in zone 8, as are the outer Lofoten Islands at 68°N. Select Page. [2] The Arnold map was subsequently updated in 1951, 1967, and finally 1971, but eventually fell out of use completely. [13], In addition, the Köppen climate classification system can be used as a more general guide to growing conditions when considering large areas of the Earth's surface or attempting to make comparisons between different continents. Based on the 1990 USDA Hardiness Zone Map, this interactive version covers the state of Hawaii which ranges from USDA Zone 10a to USDA Zone 11a. Related Turkey Maps: List of Hardiness Zones for Locations in Turkey . Location Hardiness Zone; Adana: The far northern portion on the central interior of the mainland have some of the coldest zones (zones 5, 4, and small area of zone 3) and often have much less consistent range of temperatures in winter due to being more continental, and thus the zone map has its limitations in these areas. Often listed as zones 10 or 11 plants these are tropical plants used frequently as tender perennials, annuals, or seasonal tropical plants to … Unless otherwise specified, "hardiness zone" or simply "zone" usually refers to the USDA scale. Plant Hardiness Zone Maps for Neighboring Countries. USDA Plant Hardiness Zone at popflock.com Find your USDA zone using these state maps. Whilst the USDA system of plant hardiness zones is well adopted across the world, it’s … [16], Owing to the moderating effect of the North Atlantic Current on the Irish and British temperate maritime climate, Britain, and Ireland even more so, have milder winters than their northerly position would otherwise afford. Warm region gardeners are often frustrated by their inability to grow many types of plants that are not hardy in their zone. The 1990 version of the USDA Plant Hardiness Zone Map included Canada and Mexico, but they were removed with the 2012 update to focus on the United States and Puerto Rico. The US Hardiness Zones . Obtain Plant Hardiness Zone Information. The warmest zone in the 48 contiguous states is the Florida Keys (11b) and the coldest is in north-central Minnesota (3a). For instance, despite having similar daily means and temperature amplitudes to Nantucket, Massachusetts for each month, Sarajevo has recorded below-freezing temperatures in every month of the year.[28][29]. The USDA map was revised and reissued in 1990 with freshly available climate data, this time with 5-degree distinctions dividing each zone into new "a" and "b" subdivisions. Blooming from late spring to fall (all year in mild winter areas), daisy-like, fiery orange-red flowers, adorned with golden centers, appear at the branch tips. Many zone boundaries were changed as a result of the more recent data, as well as new mapping methods and additional information gathered. Paperwhites are members of the daffodil family, Narcissus tazetta. These examples prove that local topography can have a pronounced effect on temperature and thus on what is possible to grow in a specific region. Tulips for example, can be planted in as low as Zone 4. Only 738 Australian stations have records of more than ten years (one station per 98,491 hectares or 243,380 acres), though more populated areas have relatively fewer hectares per station. This information is based on a USDA standard, called hardiness zones , which considers the environmental conditions that plants need to thrive in certain locations. Zone 4 lies between the Arctic Circle and about 64–65°N, with cities such as Oulu and Jokkmokk, zone 5 (south to 61–62°N) contains cities such as Tampere, Umeå, and Östersund. Get USDA Plant Hardiness Zone essential facts. Climate variables that reflect the capacity and detriments to plant growth are used to develop an index that is mapped to Canada's Plant Hardiness Zones. Lower zones can be found in Alaska (down to 1). They do not account for average maximum temperatures, for example, and some plants may struggle. In the Iberian Peninsula, parts of the southernmost zone of Spain in coastal Andalucía (parts of the provinces of Cádiz, Almería and Málaga) belong to zone 11a[26] as well as an area around Lagos and Vila do Bispo in the southwesternmost coastal strip of Portugal belong to zone 11a. It consists of three archipelagos, the Portuguese Azores and Madeira, belonging to zones 11a/11b and 11b/12a respectively and the Spanish Canary Islands, part of zones 12a/12b. Save for a very small spot near Karasjok, Norway, which is in zone 2, nowhere in the Arctic part of Scandinavia does it get below zone 3. Zone 10 (30 to 40): This is a good growing environment for peanuts, ginger, agave, and geraniums. For example, zone 8 covers coastal, high latitude, cool summer locations like Seattle and London, as well as lower latitude, hot summer climates like Charleston and Madrid. Owing to its position in the Atlantic, its latitude and the effects of the Gulf Stream, the European Macaronesia has by far the warmest winters out of any place in Europe. Browse our guides to 11 to learn how to become a better gardener. The USDA system was originally developed to aid gardeners and landscapers in the United States. Navigate the map. In the United States, most of the warmer zones (zones 9, 10, and 11) are located in the deep southern half of the country and on the southern coastal margins. The zones are defined by steps of 5 degrees Celcius, from −15–−10 °C for zone 1 to 15–20 °C for zone 7. [citation needed]. But, in Montreal, located to the southwest in zone 5, it is sometimes difficult to cultivate plants adapted to the zone because of the unreliable snow cover. Add USDA Plant Hardiness Zone to your PopFlock.com topic list or share. The zones are defined by minimum temperature. Hailing from the temperate shores of the southeastern Mediterranean, these bright, peppery-scented bulb flowers are not winter hardy. Zone 11. A hardiness zone is a geographic area defined to encompass a certain range of climatic conditions relevant to plant growth and survival. United States hardiness zones (USDA scale), American Horticultural Society heat zones, Y = -67.62 + 1.734X₁ + 0.1868X₂ + 69.77X₃ + 1.256X₄+ 0.006119X₅ + 22.37X₆ - 0.01832X₇, "7a" areas not part of downtown Washington. All these coastal locations have one thing in common, though, which are cold, damp summers, with temperatures rarely exceeding 20 °C (68 °F), or 15 °C (59 °F) in Longyearbyen. USDA Agricultural Research Service (USDA-ARS) website. fern • Europe • USDA 1 • 100 cm • - • ☆27 • Asarum europaeum. Drawbacks. As an extreme example, due to the Gulf stream most of the United Kingdom is in zones 8–9, while in the US, zones 8–9 include regions such as the subtropical coastal areas of the southeastern US and Mojave and Chihuahuan inland deserts, thus an American gardener in such an area may only have to plan for several nights of cold temperatures per year, while their British counterpart may have to plan for several months. USDA Plant Hardiness Zone Map. Shop; Specials; About; Resources; Contact Us; Gift Cards; Sign Up For Our Newsletter; ‹ Continue Shopping Secure Checkout Learn how and when to remove this template message, "History of Plant Hardiness Zone Maps – The Rest of the Story", "New arborday.org Hardiness Zone Map reflects warmer climate : Latest hardiness zones, based on most current temperature data available, suggest up-to-date choices for best trees to plant", "What's New | USDA Plant Hardiness Zone Map", "Beyond Traditional Hardiness Zones: Using Climate Envelopes to Map Plant Range Limits", "Die Wärmezonen der Erde, nach der Dauer der heissen, gemässigten und kalten Zeit und nach der Wirkung der Wärme auf die organische Welt betrachtet [The thermal zones of the Earth according to the duration of hot, moderate and cold periods and of the impact of heat on the organic world]", "Natural Resources Canada – Plant Hardiness of Canada", "Woody Ornamental Plant Zonation: III. [30], South Africa has five horticultural or climatic zones. The low latitude and often stable weather in Florida, the Gulf Coast, and southern Arizona and California, are responsible for the rarity of episodes of severe cold relative to normal in those areas. Feijoa sellowiana) (pineapple guava) Native to South America; Zones 8 to 11; height 6 feet; full sun. Keep in mind that local variations such as moisture, soil, winds, and other conditions might affect the viability of individual plants. It revised hardiness zones, reflecting generally warmer recent temperatures in many parts of the country, and appeared similar to the AHS 2003 draft. The Australian National Botanic Gardens have devised another system more in keeping with Australian conditions. To pan and zoom, use your mouse and scroll wheel, the arrow keys on your keyboard, or the zoom slider on … In Sweden and Finland generally, at sea level to 500 metres (1,600 ft), zone 3 is north of the Arctic Circle, including cities like Karesuando, Pajala, and Rovaniemi. The USDA Plant Hardiness Zone Map is a valuable agricultural and horticultural reference. The annual extreme minimum temperature is a useful indicator, but ultimately only one factor among many for plant growth and survival. [8] The Canadian government publishes both Canadian and USDA-style zone maps. Some plants found at your local Lowe’s will indicate much warmer cold hardiness zone than what is found in your area. These maps are based on the average annual extreme minimum temperatures. The Mediterranean Sea acts as a temperature regulator, so this area is generally warmer than other parts of the continent; except in mountainous areas where the sea effect lowers, it belongs in zones 8–10; however, southern Balkans (mountainous Western and Eastern Serbia, continental Croatia, and Bulgaria) are colder in winter and are in zones 6–7. Zone 12 (50 to 60): Grow crops like summer squash, hot pepper, borage, and heliconia if you live in Zone … Scandinavia lies at the same latitude as Alaska or Greenland, but the effect of the warm North Atlantic Current is even more pronounced here than it is in Britain and Ireland. The Åland Islands, as well as coastal southern Sweden, and the Stockholm area are in zone 7. Zone information alone is often not adequate for predicting winter survival, since factors such as frost dates and frequency of snow cover can vary widely between regions. Plant Hardiness Zones. The 2012 USDA Plant Hardiness Zone Map is the standard by which gardeners and growers can determine which plants are most likely to thrive at a location. This evergreen shrub produces pretty, bicolor flowers followed by edible fruit. Click on the map to display a pop-up window with the plant hardiness zone, average temperature, and temperature range. The U.S. zone 11 has an average lowest temperature of 40 degrees Fahrenheit (4 C.). Tromsø, a coastal city in Norway at 70°N, is in zone 7, and even Longyearbyen, the northernmost true city in the world at 78°N, is still in zone 4. To figure out what corresponds to the USDA equivalent zone, simply take the average lowest temperature of the region and add 10 degrees for each higher zone. Attractive to butterflies and bees, they gradually mature to red and give way to small dandelion-like puffs of seed. If you see a hardiness zone in a gardening catalog or plant description, chances are it refers to this USDA map. Suitable hardiness means a plant can be expected to grow in the zone’s temperature extremes, as determined by the lowest average annual temperature. [16] This index comes from a formula originally developed by Ouellet and Sherk in the mid-1960s. The modern USDA system began at the US National Arboretum in Washington. New growth may be insufficient or fail to harden off affecting winter survival. About the USDA Hardiness Zones. The map is produced by the U.S. Department of Agriculture (USDA) Agricultural … The 2003 map placed many areas approximately a half-zone higher (warmer) than the USDA's 1990 map. Some isolated, high elevation areas of the Alps and Carpathians may even go down to zone 3 or 4. The back of a packet of seeds tells you how much light, water and spacing a plant needs to grow and thrive. Europe Hardiness Zone Map has a variety pictures that aligned to locate out the most recent pictures of Europe Hardiness Zone Map here, and then you can acquire the pictures through our best europe hardiness zone map collection.Europe Hardiness Zone Map pictures in here are posted and uploaded by secretmuseum.net for your europe hardiness zone map images collection. [27] The Balkan area is also more prone to cold snaps and episodes of unseasonable warmth. Often we are asked by PLANTS users about the USDA Plant Hardiness Zone Map, but neither PLANTS/ NPDT, nor the USDA NRCS as a whole, are responsible for this map. The southern middle portion of the mainland and central coastal areas are in the middle zones (zones 8, 7, and 6). Waksmund is in zone 3b while nearby Kraków, only 80 km (50 mi) to the north and 300 m (980 ft) lower is in zone 6a. [17][18][19], The formula used is: Y = -67.62 + 1.734X₁ + 0.1868X₂ + 69.77X₃ + 1.256X₄+ 0.006119X₅ + 22.37X₆ - 0.01832X₇, For practical purposes, Canada has adopted the American hardiness zone classification system. [7] Two new zones (12 and 13) were added to better define and improve information sharing on tropical and semitropical plants, they also appear on the maps of Hawaii and Puerto Rico. The USDA Hardiness Zone Map divides North America into 11 separate planting zones; each growing zone is 10°F warmer (or colder) in an average winter than the adjacent zone. [31], The USDA map published in 2012 shows that most of the US has become a half zone (5 °F) hotter in winter compared to the 1990 release. You can then choose plants that are suggested for that USDA zone. The southern European marker plant for climate as well as cultural indicator is the olive tree, which cannot withstand long periods below freezing so its cultivation area matches the cool winter zone. Zone 11 (40 to 50): Beets, mangos, begonias, and chives are especially productive in this zone. The USDA rejected the AHS 2003 draft map and created its own map in an interactive computer format, which the American Horticultural Society now uses. Generally speaking, the hardiness zones are high considering the latitude of the region, although not as high as Northern Europe with the Shetland Islands where zone 9 extends to over 60°N. Hardiness Zone Converter. The Croatian (Dalmatian) coast, Albania, and northern Greece are in zones 8–9, as are central-northern Italy (hills and some spots in Po Valley are however colder) and southern France; Central Iberia is 8–9 (some highland areas are slightly colder). The west coast of Sweden (Gothenburg and southwards) enjoys particularly mild winters and lies in zone 7, therefore being friendly to some hardy exotic species (found, for example, in the Gothenburg Botanical Garden), the southeast coast of Sweden has a colder winter due to the absence of the Gulf Stream. But even without these gorgeous blooms, this plant is worth growing for its shiny, palmately divided, deep green leaves. The hardiness category is indicated for each individual plant species. There are many other climate parameters that a farmer, gardener, or landscaper may need to take into account as well, such as humidity, precipitation, storms, rainy-dry cycles or monsoons, and site considerations such as soil type, soil drainage and water retention, water table, tilt towards or away from the sun, natural or manmade protection from excessive sun, snow, frost, and wind, etc. That means a freeze is rare and daytime temperatures are warm even in winter. Find your garden’s hardiness zone by Zip Code.. Gardeners rely on USDA Hardiness Zone Maps to tell us which plants survive and thrive locally. [9][3][12], An alternative means of describing plant hardiness is to use "indicator plants". [20], USDA zones do not work particularly well in the UK as they are designed for a continental climate. For example, a plant may be described as "hardy to zone 10": this means that the plant can withstand a minimum temperature of 30 °F (−1.1 °C) to 40 °F (4.4 °C). The original and most widely used system, developed by the United States Department of Agriculture (USDA) as a rough guide for landscaping and gardening, defines 13 zones by annual extreme minimum temperature. Listed alphabetically by Scientific name first and common name second. [22] The RHS hardiness ratings are based on absolute minimum winter temperatures (in °C) rather than the long-term average annual extreme minimum temperatures that define USDA zones.[22]. Other hardiness rating schemes have been developed as well, such as the UK Royal Horticultural Society and US Sunset Western Garden Book systems. Therefore, to ensure your new acquisition will survive and grow year after year, you will need to compare the hardiness zone of your area with the hardiness zone of your plant (included in most American references books, nursery catalogs and…, Pseudogynoxys chenopodioides (Mexican Flame Vine) is an attractive evergreen vine with fleshy, arrowhead-shaped leaves and large clusters of brilliant flowers over a long season. Many areas were a half zone warmer than the previous 1990 map. Botanical name Type Origin Zone Height Flower Points Search; Sort by. The 2012 USDA Hardiness Zone Map Move your mouse over the map to zoom in for a closer look at your area. The USDA hardiness zones are not used in Australia. Lithuania is in zones 5a, 5b, 6a, 6b, 7a and 7b. If the snow cover is reliable, the actual temperature to which the roots are exposed will not be as low as the hardiness zone number would indicate. In addition, the zones do not incorporate any information about summer temperature or insolation; thus sites which may have the same mean winter minima, but markedly different summer temperatures, will be accorded the same hardiness zone. The first map was issued in 1960, and revised in 1965. USDA zones 9 to 11 are areas with lowest temperatures at 25 to 40 degrees F. (-3-4 C.). In Central Europe, the relevant zones decrease from zone 8 on the Belgian, Dutch, and German North Sea coast, with the exception of some of the Frisian Islands (notably Vlieland and Terschelling), the island of Helgoland, and some of the islands in the Rhine-Scheldt estuary, which are in zone 9, to zone 5 around Suwałki, Podlachia on the far eastern border between Poland and Lithuania. For example, Australian zone 3 is roughly equivalent to USDA zone 9. The spread of weather stations may be insufficient and too many places with different climates are lumped together. The USDA system was originally developed to aid gardeners and landscapers in the United States.

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