When can I plant Primula in Zone 9a

One of the best tools that we have as gardeners to help us determine our gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for our area.

The USDA zone info for Zone 9a should be reffered to in order to determine when it's the best time to plant primula.


Planting Calendar for Primula

Frost tolerance for primula: Very tolerant of frost.
When you should plant them: Up to 7 weeks before last frost.

Primula do well in cold which means that you can plant them much earlier than other plants that might not handle the cold.

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

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

The last month that you can plant primula and expect a good harvest is probably October. Any later than that and your primula may not have a chance to really do well. If you are starting your primula indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

On average the last frost has passed is on February 15 in Zone 9a. We can expect an average low temperature of 20°F in the coldest months of winter.

It's important to remember that our actual date of last frost is just an average because it is based on the USDA zone info for Zone 9a and it changes from year to year. Since half of the time in Zone 9a we get surprised by a frost after February 15 be ready to protect your primula 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.