One of the best tools that you have as gardeners to help us estimate 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.

One way of estimating when to plant evolvulus is to refer to the USDA zone info for South Haven.

Planting Calendar for Evolvulus

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

Since evolvulus do not do well in cold weather it is necessary to wait until after the last frost before you can plant them.

The earliest that you can plant evolvulus in South Haven 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 grow to maturity. You can get started a couple of weeks earlier by starting your evolvulus indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in South Haven. In the coldest months of winter you should expect an average low temperature of -5°F.

Always keep in mind that USDA zone info for South Haven is just an average and the actual date of last frost is different every year. Half of the time in South Haven there is a last frost after April 15 so just be sure to be ready to cover your evolvulus if you have a surprise late frost.

USDA Zone Info for South Haven

Here is the info for USDA Zone 6b.

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

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

Plants to Grow in South Haven

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