One of the first steps you take when you are estimating your gardening schedule is find your 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.

By checking out the USDA zone info for Humble it's a good idea to determine when it's possible to plant dipladenia.

Planting Calendar for Dipladenia

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

Since dipladenia are not cold tolerant it's necessary to wait until after the last frost has passed before you can plant them.

The earliest that you can plant dipladenia in Humble 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 dipladenia and expect a good harvest is probably September. Any later than that and your dipladenia may not have a chance to fully mature. Starting your dipladenia indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is February 15 in Humble. You can expect an average low temperature of 20°F in the coldest months of winter.

Since the USDA zone info for Humble is not always accurate the actual date of last frost will vary from year to year. Half of the time in Humble you get surprised by a frost after February 15 so make sure that you are prepared to protect your dipladenia if you have a surprise late frost.

USDA Zone Info for Humble

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

This means that on a really cold year, the coldest it will get is 20°F. On most years you should be prepared to experience lows near 25°F.

Plants to Grow in Humble

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