The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You will be able to figure out when you can plant dipladenia by reviewing the USDA zone info for Maryland Heights.

Planting Calendar for Dipladenia

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

You really shouldn't plant dipladenia until after the last frost when the weather gets warmer because they require warm weather.

The earliest that you can plant dipladenia in Maryland Heights 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 dipladenia and expect a good harvest is probably August. You probably don't want to wait any later than that or else your dipladenia may not have a chance to fully mature. If you are starting your dipladenia indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Maryland Heights. It might get as low as -10°F during the coldest months of winter.

Remember that USDA zone info for Maryland Heights is not always accurate and the actual date of last frost is different every year. Half of the time in Maryland Heights it frosts late in the year after April 15 so make sure that you are ready to cover your dipladenia in the event of one of those late frosts.

USDA Zone Info for Maryland Heights

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Maryland Heights

You may be interested in your other planting guides for Maryland Heights.