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Most common annual vegetables have optimal germination temperatures between 75–90 F (24–32 C), though many species (e.g. radishes or spinach) can germinate at significantly lower temperatures, as low as 40 F (4 C), thus allowing them to be grown from seeds in cooler climates. Suboptimal temperatures lead to lower success rates and longer ...
Growing degrees (GDs) is defined as the number of temperature degrees above a certain threshold base temperature, which varies among crop species. The base temperature is that temperature below which plant growth is zero. GDs are calculated each day as maximum temperature plus the minimum temperature divided by 2, minus the base temperature.
Warm stratification requires temperatures of 15–20 °C (59–68 °F). In many instances, warm stratification followed by cold stratification requirements can also be met by planting the seeds in summer in a mulched bed for expected germination the following spring. Some seeds may not germinate until the second spring. [citation needed]
Late summer into early fall, as the temperature begins to drop, is the best time to plant all types of cool-weather grass seed. The grasses need to have time to establish roots before the first ...
When temperatures neared 80°F, I removed the lid to prevent excessive heat buildup. All three varieties germinated well and the seedlings were ready for transplanting in three weeks.
Germination is a process by which the seed ... Optimum factors for ideal pollination are a relative humidity rate of 50–70% and temperature of 24.4 °C. If the ...
Seed dormancy is defined as a seed failing to germinate under environmental conditions optimal for germination, normally when the environment is at a suitable temperature with proper soil moisture. This true dormancy or innate dormancy is therefore caused by conditions within the seed that prevent germination.
Ideal growing temperature is 25 °C. [1] Lower temperatures suppress germination, and extremely high temperatures inhibit yield. [1] Even moderate variations in the growing climate can affect yield. Growing winged bean in lower temperatures can increase tuber production. [1] Leaf expansion rate is higher in a warmer climate.
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