Nov '24 • Zone 9B
Seed Germination Temperature Guide
Vegetables
1. Cool-season crops (e.g., lettuce, spinach, kale, peas, carrots):
• Ideal temperature: 60–75°F (15–24°C)
• Minimum temperature: 35–45°F (2–7°C)
• Maximum temperature: 85°F (29°C)
2. Warm-season crops (e.g., tomatoes, peppers, cucumbers, beans, squash):
• Ideal temperature: 70–85°F (21–29°C)
• Minimum temperature: 50–60°F (10–16°C)
• Maximum temperature: 95°F (35°C)
Herbs
• Cool-season herbs (e.g., parsley, cilantro, dill):
• Ideal temperature: 55–70°F (13–21°C)
• Warm-season herbs (e.g., basil, oregano, thyme):
• Ideal temperature: 70–85°F (21–29°C)
Flowers
1. Cool-season flowers (e.g., pansies, snapdragons):
• Ideal temperature: 60–70°F (15–21°C)
2. Warm-season flowers (e.g., zinnias, marigolds):
• Ideal temperature: 70–80°F (21–27°C)
General Guidelines:
• Too cold: Below the minimum temperature, seeds are unlikely to germinate.
• Too hot: Above the maximum temperature, germination rates decline, and seeds may die.
• Consistent warmth: Using a seedling heat mat can help maintain optimal temperatures, especially for warm-season crops.
Let me know if you want specific temperatures for a particular plant!
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Seed Germination Temperature Guide
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