When can I plant Lupine in Zone 9a

The USDA Zone info is a great tool for gardeners to help us determine our gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for our area.

A way of determining when it's possible to plant lupine is to examine the USDA zone info for Zone 9a.


Planting Calendar for Lupine

Frost tolerance for lupine: Tolerant of some frost.
When you should plant them: Up to 5 weeks before last frost.

You can plant lupine a little earlier in the year because they do well in moderate cold.

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

The earliest that you can plant lupine 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 lupine and expect a good harvest is probably October. Any later than that and your lupine may not have a chance to really do well. Starting your lupine indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on February 15 in Zone 9a. In the coldest months of winter we can expect an average low temperature of 20°F.

Always keep in mind that our actual date of last frost is 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 it frosts late in the year after February 15 be ready to cover your lupine 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.