Different types of seeds respond to different growing conditions and are best sown at the optimum time. For example, capsicum seeds will only germinate when the soil temperature is no lower than 15ºC but spinach seed will germinate at a minimum of 5ºC.
Why timing is important in seed sowing
Temperature to germinate
Time to harvest
Seeds need to be sown at the correct time to allow the plant to go through its growing cycle in the best possible conditions. For example, snow peas need roughly 9 weeks before they can be harvested. The flowers are very sensitive to heat so the seeds must be sown in time to flower and produce peas before the weather warms up.