When can I plant Sweet Peas in Zone 9a

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 can estimate when to plant sweet peas in Zone 9a by checking out the USDA zone info.


Planting Calendar for Sweet Peas

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

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

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

The earliest that you can plant sweet peas 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 sweet peas and expect a good harvest is probably September. Any later than that and your sweet peas may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your sweet peas indoors.

Last Frost Date

In Zone 9a the average date of last frost happens on February 15. We should expect an average low temperature of 20°F in the coldest months of winter.

Since the USDA zone info for Zone 9a is just an average our actual date of last frost will vary from year to year. Half of the time in Zone 9a last frost occurs after February 15 so always be ready to protect your sweet peas if we have a 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.