Seed Germination Soil Temperatures

You’ve waited all winter to begin your new vegetable garden. According to the calendar, it’s just about the right time. But, wait!!!!! First, you need to know the proper seed germination soil temperature for each of your plants. If the soil temperature is not right, your seeds may fail to germinate. Both the seedlings that do sprout, and your garden transplants, can become stunted, or even die. The Seed Germination Temperature chart displayed below. will guide you to the right conditions for successful planting.

For the absolute best start to your garden season, plant your vegetables, both seeds, and seedlings, when the soil temperatures are optimum to do so. This will help to avoid transplanting shock for your seedlings.

Most seeds require warm soil temperatures down to 3 inches deep, to encourage germination.   

Use a garden soil thermometer, to check the soil temperature. Simply insert the thermometer to a depth of 2-3 inches. Wait three minutes, then take the reading.

Use the chart below to identify the ideal soil temperatures for your vegetables.

Gardening Tip: It is also important not to plant seeds above the maximum range. Seeds can literally bake in hot soils.