One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The USDA zone info for Swarthmore should be read to figure out when it's a good idea to plant evolvulus.

Planting Calendar for Evolvulus

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

Evolvulus do not do well in cold weather which tells us that you have to wait until it warms up after the last frost before you can plant them.

The earliest that you can plant evolvulus in Swarthmore 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 evolvulus and expect a good harvest is probably August. If you wait any later than that and your evolvulus may not have a chance to fully mature. You can get started a little bit earlier by starting your evolvulus indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Swarthmore. In the coldest months of winter you should expect an average low temperature of 0°F.

Since the USDA zone info for Swarthmore is not always accurate the actual date of last frost changes from year to year. Half of the time in Swarthmore there is a last frost after April 15 so make sure that you are ready to cover your evolvulus in the event of a late frost.

USDA Zone Info for Swarthmore

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	0°F
Highest Expected Low	5°F

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in Swarthmore

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