One of the first steps you take when you are figuring out your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

It's possible to determine when it's possible to plant sunflowers by using the USDA zone info for Addison.

Planting Calendar for Sunflowers

Frost tolerance for sunflowers:	Not tolerant of frost.
When to plant:	After the last frost.

Since sunflowers require warm weather it's important to wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant sunflowers in Addison is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant sunflowers and expect a good harvest is probably August. You probably don't want to wait any later than that or else your sunflowers may not have a chance to fully mature. You can get started a few weeks earlier by starting your sunflowers indoors.

Last Frost Date

The average date of last frost is March 15 in Addison. It might get as low as 10°F during the coldest months of winter.

Since the USDA zone info for Addison is an average the actual date of last frost will vary from year to year. Since half of the time in Addison you get surprised by a frost after March 15 be ready to cover your sunflowers if you have a surprise late frost.

USDA Zone Info for Addison

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°F

This means that on a really cold year, the coldest it will get is 10°F. On most years you should be prepared to experience lows near 15°F.

Plants to Grow in Addison

You may be interested in your other planting guides for Addison.