Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

By checking out the USDA zone info for Winter Haven you should be able to determine when it's a good idea to plant sunflowers.

Planting Calendar for Sunflowers

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

Since sunflowers do not do well in cold weather you need to wait until after the last frost has passed before you can plant them.

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

The last month that you can plant sunflowers and expect a good harvest is probably September. Any later than that and your sunflowers may not have a chance to grow to maturity. Starting your sunflowers indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

On average all chance of frost has passed is on February 15 in Winter Haven. It might get as low as 25°F during the coldest months of winter.

Since the USDA zone info for Winter Haven is an average the actual date of last frost is different every year. Half of the time in Winter Haven there is a last frost after February 15 so always be ready to cover your sunflowers if you have a late frost.

USDA Zone Info for Winter Haven

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Winter Haven

You may be interested in your other planting guides for Winter Haven.