When to Plant Achillea in Zone 11b

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

The USDA zone info for Zone 11b can be used to estimate when it's the best time to plant achillea.


Planting Calendar for Achillea

Frost tolerance for achillea: Very tolerant of frost.
When to plant: Up to 7 weeks before last frost.

Since achillea are one of those plants that can tolerate quite a bit of cold weather you can plant them much earlier in the year than other plants that might not handle the cold.

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

The earliest that you can plant achillea 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 achillea and expect a good harvest is probably November. If you wait any later than that and your achillea may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your achillea indoors.

Last Frost Date

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

Keep in mind that the actual date of last frost is an average because it is based on the USDA zone info for Zone 11b and it will vary from year to year. Since it never frosts in Zone 11b you do not have to be ready to protect your achillea if you 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 your other planting guides for Zone 11b.