When can I plant Datura in Zone 9a

One of the first steps we take when we are determining our gardening schedule is find our USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for our area.

The USDA zone info for Zone 9a can be reffered to in order to determine when you can plant datura.


Planting Calendar for Datura

Frost tolerance for datura: Tolerant of a very small amount of frost.
When you should plant them: Up to 3 weeks before last frost.

You can plant datura slightly earlier in the year because they are barely cold tolerant.

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

The earliest that you can plant datura in Zone 9a is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant datura and expect a good harvest is probably September. If you wait any later than that and your datura may not have a chance to really do well. Starting your datura 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 9a. It might get as low as 20°F during the coldest months of winter.

Keep in mind that our actual date of last frost may not be accurate from year to year because it is based on the USDA zone info for Zone 9a and it can change quite a bit from year to year. Half of the time in Zone 9a there is a last frost after February 15 so make sure that you are prepared to protect your datura if we have a surprise late frost.

USDA Zone Info for Zone 9a

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 Low20°F
Highest Expected Low25°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 Zone 9a

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