Plant Hardiness Zone Map. Extended Metadata:. Agricultural Research Service. United States Of America. Online database. USDA gardeners growers winter temperature geographic information systems microclimate hills valleys air cold tolerance autumn weather climatic zones growing season planting season winter hardiness. Sorry to hear about your loss. But if u bought from us, you would have received an invoice directing you to all our In-Depth Growing Tutorials.
We put close to 20 years of info into our Tutorials, so be sure to explore the Menu on our Website. I have read many posts here and I see people having the same problems that I did when I started growing poppies. You have to realize that you are farming and you have to dedicate a hour or two everyday in your garden.
Everyday you need to water, weed, protect from animals, high winds and cut off dead lower leaves when the plants fruit to keep the stems dry. When the plants are cabbage to bolt stage they need to be fertilized every two weeks. Most problems are from plant spacing.
Plants that are planted too close together will not let air circulate enough to keep the lower stems dry which leads to stems getting soggy and the plant dies from damping off fungus. I tried using an Earthbox one year with amazing results until this problem happened to all the plants at the same time. The problem is that potting mix is always damp in an Earthbox and poppies need well drained soil. Timing is critical, you have to plant at the precise time for your location.
I live in zone 9a so the seedling have to be in the ground the 1st or 2nd week of December. This year we had a hard rain here for 3days straight the same week I planted my seedlings. Over half off the seedlings died, the rain just pounded them flat so I had to germinate more plants. Some of the plants were not in the ground until mid- January and never flowered. My plants start blooming every year around March 20 and continue to flower for a month or longer.
Different poppies have varied life cycles but only the Afghans will flower in less than days. Several of my plants died from the fungus or disease that turns the inside of the stems into a purlpe jelly and the leaves wilt. Zone maps are tools that show where various permanent landscape plants can adapt. If you want a shrub, perennial, or tree to survive and grow year after year, the plant must tolerate year-round conditions in your area, such as the lowest and highest temperatures and the amount and distribution of rainfall.
To help develop the new map, USDA and OSU requested that horticultural and climatic experts review the zones in their geographic area, and trial versions of the new map were revised based on their expert input. Compared to the version, zone boundaries in the edition of the map have shifted in many areas. This is mostly a result of using temperature data from a longer and more recent time period; the new map uses data measured at weather stations during the year period In contrast, the map was based on temperature data from only a year period of However, some of the changes in the zones are a result of new, more sophisticated methods for mapping zones between weather stations.
These include algorithms that considered for the first time such factors as changes in elevation, nearness to large bodies of water, and position on the terrain, such as valley bottoms and ridge tops. Also, the new map used temperature data from many more stations than did the map. These advances greatly improved the accuracy and detail of the map, especially in mountainous regions of the western United States. In some cases, they resulted in changes to cooler, rather than warmer, zones.
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