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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).
Natural cold stratification. Wildflower seeds that are native to cold regions germinate better if they’re exposed to a cold and moist environment before they sprout. ... Heat-loving plants, like ...
This is also the ideal time to cold stratify wildflower and native plant seeds that need to be exposed to a cold and moist environment for a few weeks before planting. Plants that are native to ...
This treatment may be seed scarification, stratification, seed soaking or seed cleaning with cold (or medium hot) water. Seed soaking is generally done by placing seeds in medium hot water for at least 24 to up to 48 hours [ 2 ] Seed cleaning is done especially with fruit, as the flesh of the fruit around the seed can quickly become prone to ...
The seed should germinate during late winter or spring. [37] [51] If using stored seed, they should be pre-soaked in warm water for up to 48 hours and then given 2 weeks of warm followed by 3–4 months cold stratification, to break the embryonic dormancy phase. They should germinate between 1 and 6 months at 20 °C. [51]
Many plants require a period of cold temperatures to break their dormancy cycle.
It is also indicated when dormant seed embryos are excised and produce healthy seedlings: or when up to 3 months of cold (0–10 °C) or warm (=15 °C) stratification increases germination: or when dry after-ripening shortens the cold stratification period required. In some seeds physiological dormancy is indicated when scarification increases ...
Many plant seeds require a period of cold temperatures, called stratification, to break dormancy. This makes winter an ideal time to sow wildflower seeds, cold hardy annuals, and many perennials ...
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