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Any seeds that are indicated as needing a period of warm stratification followed by cold stratification should be subjected to the same measures, but the seeds should additionally be stratified in a warm area first, followed by the cold period in a refrigerator later. Warm stratification requires temperatures of 15–20 °C (59–68 °F).
This is generally done with seeds that require a period of cold stratification. The method takes advantage of natural temperatures, rather than artificially refrigerating seeds. Winter sowing involves sowing seeds in a miniature greenhouse outside during winter, allowing them to germinate in spring.
By treating wheat seeds with moisture as well as cold, Lysenko induced them to bear a crop when planted in spring. [8] Later however, according to Richard Amasino, Lysenko inaccurately asserted that the vernalized state could be inherited, i.e. the offspring of a vernalized plant would behave as if they themselves had also been vernalized and ...
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D. Landreth Seed Company, established 1784; Fedco Seeds, established in 1978; Ferry-Morse Seed Company, established in 1856; Gurney's Seed and Nursery Company, established in 1866; Harris Seeds, established in 1879 [5] [6] [7] Hudson Valley Seed Company, established in 2009 [8] [9] J.W. Jung Seed Company, established in 1907; McKenzie Seeds ...
[11] [12] The seeds of some milkweeds need periods of cold treatment (cold stratification) before they will germinate. [13] To protect seeds from washing away during heavy rains and from seed–eating birds, one can cover the seeds with a light fabric or with an 0.5 in (13 mm) layer of straw mulch. [14] However, mulch acts as an insulator ...
All-America Selections (AAS) is an American organization which tests new varieties of seed for use in gardening, and promotes those judged to perform best through an awards scheme ("AAS Winners"). [1] The testing program involves horticulture professionals.
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