When can I plant Amaranthus in Zone 11b

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.

A common way of determining when it's possible to plant amaranthus is to use the USDA zone info for Zone 11b.


Planting Calendar for Amaranthus

Frost tolerance for amaranthus: Not tolerant of frost.
When you should plant them: After the last frost has passed.

Amaranthus are not cold tolerant which means that you must wait until it warms up after the last frost has passed before you can plant them.

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

The earliest that you can plant amaranthus 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 amaranthus and expect a good harvest is probably November. You probably don't want to wait any later than that or else your amaranthus may not have a chance to grow to maturity. If you are starting your amaranthus indoors then you might be able to get away with starting them 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.

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 11b and it can change quite a bit from year to year. Since it never frosts in Zone 11b you do not have to be ready to cover your amaranthus 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.