What is the optimum germination temperature for most bedding plant seeds?

The optimum germination temperature for most bedding plant seeds typically falls within the range of 75-85 degrees Fahrenheit. At this temperature, the metabolic activities of the seeds are stimulated efficiently, enhancing cellular respiration and the breaking of dormancy. Germination requires specific conditions, and warmth is a critical factor that encourages seeds to absorb water, swell, and eventually sprout.

While lower temperatures, such as those in the options that suggest ranges like 50-55 degrees or 60-65 degrees, may not provide the necessary warmth to trigger optimal germination rates, and temperatures above 85 degrees can stress seeds and inhibit germination, the middle range of 65-75 degrees, while suitable for some varieties, is generally not ideal for the majority of bedding plants. Thus, the chosen range of 75-85 degrees is most favorable for a wide variety of bedding plant seeds, ensuring successful germination and subsequent growth.