One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You should be able to estimate when it's the best time to plant dipladenia by referring to the USDA zone info for Hearne.

Planting Calendar for Dipladenia

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

Since dipladenia do not do well in cold weather you need to wait until after the last frost before you can plant them.

The earliest that you can plant dipladenia in Hearne 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 really do well. You can get started a little bit earlier by starting your dipladenia indoors.

Last Frost Date

The average date of last frost is March 15 in Hearne. In the coldest months of winter you should expect an average low temperature of 15°F.

Keep in mind that USDA zone info for Hearne may not be accurate from year to year and the actual date of last frost is different every year. Half of the time in Hearne it frosts late in the year after March 15 so make sure that you are prepared to cover your dipladenia in the event of one of those late frosts.

USDA Zone Info for Hearne

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°F

This means that on a really cold year, the coldest it will get is 15°F. On most years you should be prepared to experience lows near 20°F.

Plants to Grow in Hearne

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