When can I plant Dipladenia in Zone 9b

The USDA Zone info is a great tool for gardeners to help us estimate our gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for our area.

You will be able to determine when to plant dipladenia by looking at the USDA zone info for Zone 9b.


Planting Calendar for Dipladenia

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

Dipladenia are not cold tolerant which means that it is necessary to wait until it warms up after the last frost when the weather gets warmer before you can plant them.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant dipladenia
Possibly ok, but a risky time to plant dipladenia
Probably not a good time to plant dipladenia

The earliest that you can plant dipladenia in Zone 9b 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. If you wait any later than that and your dipladenia may not have a chance to really do well. 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 Zone 9b. We should expect an average low temperature of 25°F in the coldest months of winter.

Always keep in mind that USDA zone info for Zone 9b may not be accurate from year to year and our actual date of last frost is different every year. Half of the time in Zone 9b it frosts late in the year after February 15 so just be sure to be ready to cover your dipladenia in the event of a surprise late frost.

USDA Zone Info for Zone 9b

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)February 15
Average Date of First Frost (fall)December 15
Lowest Expected Low25°F
Highest Expected Low30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Zone 9b

You may be interested in our other planting guides for Zone 9b.