Table of Contents
What is the optimum temperature for seed germination?
Sometimes, some seed types germinate at low temperatures such as zero or close to zero degrees, but these temperatures prevent germination of other seed types. For most plants, the optimum and maximum germination temperatures are 15-30 and 30-40°C, respectively.
Do tomato seeds need light to germinate?
Seeds don't need light to germinate, although after germination, you should ideally give the seedlings 14 or more hours of light a day. If you're growing indoors on a windowsill, be sure to place pots in a warm, sunny spot that gets a good amount of natural light.
Will tomatoes germinate at room temperature?
The length of time it takes for your seeds to germinate is heavily related to soil temperature. Tomato seeds should germinate within 5-6 days if you can keep the soil temperature around 80º F. Peppers take a little longer with a little higher temperature (7-8 days at 85º F).
How warm should the ground be before planting tomatoes?
For example, the optimum temperature range for tomatoes is 65° to 85°F (see previous chart). Within that range, it takes approximately 6 to 8 days before seeds germinate. Tomato seeds may still germinate at 50°F, but it will take over 40 days, and there will probably be no germination if the soil temperature is 104°F.