One of the most common questions we’re asked is “When should I plant seeds outside?” As outside temperature is important, the SOIL Temperature needs to be considered. Seeds require a certain temperature in order to germinate. Each plant has a specific optimum and a range within which germination will occur. The closer the temperature is to optimum, the quicker germination will occur. Most seeds germinate when the soil temperature is between 68° and 86°F. Once germination occurs, the optimum growing temperature for the seedling is about 10°F cooler than the optimum germination temperature.
- Basil 86-95°F (25-35°C)
- Beans 75-85°F (24-29°C)
- Carrots 68-77°F (20-25°C)
- Cilantro 68-86°F (20-30°C)
- Cucumber 63-73°F (17-23°C)
- Kale 70-75°F (21-24°C)
- Lettuce 60-75°F (16-24°C)
- Mint 60-70°F (15-21°C)
- Oregano 68-86°F (20-30°C)
- Parsley 65-85°F (18-29°C)
- Peas 65-75°F (18-24°C)
- Peppers 68-95°F (20-35°C)
- Radish 65-85°F (18-29°C)
- Thyme 59-68°F (15-20°C)
- Tomatoes 68-95°F (20-35°C)
- Zucchini 85-95°F (29-35°C)
You’ll find that the easiest and most successful way to sow our seed sticks outside is by following these guideline.