The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The USDA zone info for Silsbee should be used to figure out when it's the best time to plant heliotrope.

Planting Calendar for Heliotrope

Frost tolerance for heliotrope:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Since heliotrope are not cold tolerant it is important to wait until after the last frost before you can plant them.

The earliest that you can plant heliotrope in Silsbee 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 heliotrope and expect a good harvest is probably September. Any later than that and your heliotrope may not have a chance to fully mature. Starting your heliotrope indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost is on February 15 in Silsbee. You can expect an average low temperature of 20°F in the coldest months of winter.

Since the USDA zone info for Silsbee is just an average the actual date of last frost changes from year to year. Half of the time in Silsbee you get a frost after February 15 so make sure that you are ready to cover your heliotrope in the event of one of those late frosts.

USDA Zone Info for Silsbee

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

This means that on a really cold year, the coldest it will get is 20°F. On most years you should be prepared to experience lows near 25°F.

Plants to Grow in Silsbee

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