When can I plant Polygonums in Zone 11b

One of the best tools that we have as gardeners to help us figure out 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.

You will be able to estimate when it's the best time to plant polygonums by looking at the USDA zone info for Zone 11b.


Planting Calendar for Polygonums

Frost tolerance for polygonums: Not tolerant of frost.
When you should plant them: After the last frost when the weather gets warmer.

Since polygonums do not do well in cold weather it's necessary to wait until after all chance of frost has passed before you can plant them.

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

The earliest that you can plant polygonums in Zone 11b 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 polygonums and expect a good harvest is probably November. If you wait any later than that and your polygonums may not have a chance to fully mature. Starting your polygonums indoors is a great way to get them started a little bit earlier.

Last Frost Date

In Zone 11b it never frosts. In the coldest months of winter we should expect an average low temperature of 45°F.

Keep in mind that USDA zone info for Zone 11b may not be accurate from year to year and our actual date of last frost will vary from year to year. Since it never frosts in Zone 11b you do not have to be ready to cover your polygonums if we have a surprise late frost.

USDA Zone Info for Zone 11b

Here is the info for USDA Zone 11b.

Average Date of Last Frost (spring)Never
Average Date of First Frost (fall)Never
Lowest Expected Low45°F
Highest Expected Low50°F

This means that on a really cold year, the coldest it will get is 45°F. On most years you should be prepared to experience lows near 50°F.

Plants to Grow in Zone 11b

You may be interested in our other planting guides for Zone 11b.