When can I plant Amaranthus in Zone 10a

One of the best tools that we have as gardeners to help us estimate our gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for our area.

The earliest that you can plant amaranthus in Zone 10a should be figured out by using the USDA zone info.


Planting Calendar for Amaranthus

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

Since amaranthus do not do well in cold weather you must wait until 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 10a is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant amaranthus and expect a good harvest is probably September. Any later than that and your amaranthus may not have a chance to really do well. Starting your amaranthus indoors is a great way to get them started a few weeks earlier.

Last Frost Date

In Zone 10a the average date of last frost happens on January 31. In the coldest months of winter we should expect an average low temperature of 30°F.

Always keep in mind that USDA zone info for Zone 10a is just an average and our actual date of last frost is different every year. Half of the time in Zone 10a we get surprised by a frost after January 31 so always be ready to protect your amaranthus if we have one of those late frosts.

USDA Zone Info for Zone 10a

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)January 31
Average Date of First Frost (fall)December 15
Lowest Expected Low30°F
Highest Expected Low35°F

This means that on a really cold year, the coldest it will get is 30°F. On most years you should be prepared to experience lows near 35°F.

Plants to Grow in Zone 10a

You may be interested in our other planting guides for Zone 10a.