One of the first steps you take when you are figuring out your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

One way of estimating when it's a good idea to plant evolvulus is to refer to the USDA zone info for Galveston.

Planting Calendar for Evolvulus

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

Since evolvulus are not cold tolerant you need to wait until after the last frost before you can plant them.

The earliest that you can plant evolvulus in Galveston 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 evolvulus and expect a good harvest is probably September. Any later than that and your evolvulus may not have a chance to really do well. If you are starting your evolvulus indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

The average date of last frost is February 15 in Galveston. In the coldest months of winter you can expect an average low temperature of 25°F.

Since the USDA zone info for Galveston may not be accurate from year to year the actual date of last frost will vary from year to year. Half of the time in Galveston you get a frost after February 15 so make sure that you are ready to protect your evolvulus in the event of one of those late frosts.

USDA Zone Info for Galveston

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 Galveston

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