When can I plant Leeks in Zone 9a

One of the best tools that we have as gardeners to help us estimate our gardening schedule is the 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.

It's a good idea to estimate when it's possible to plant leeks by reviewing the USDA zone info for Zone 9a.


Planting Calendar for Leeks

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

You can plant leeks earlier in the year because they do well in cold.

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

The earliest that you can plant leeks 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 leeks and expect a good harvest is probably October. Any later than that and your leeks may not have a chance to fully mature. If you are starting your leeks indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

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

It's important to remember that our actual date of last frost is an average because it is based on the USDA zone info for Zone 9a and it will vary 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 leeks in the event of 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.