When can I plant Amaranthus in Zone 1a

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

In Zone 1a you can determine when it's a good idea to plant amaranthus by referring to 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.

Amaranthus are not cold tolerant which means that it is necessary to wait until it warms up after all chance of 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 1a is June. However, you really should wait until July if you don't want to take any chances.

The last month that you can plant amaranthus and expect a good harvest is probably July. 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 couple of weeks earlier.

Last Frost Date

In Zone 1a the average date of last frost happens on June 15. We should expect an average low temperature of -60°F in the coldest months of winter.

Keep in mind that USDA zone info for Zone 1a is an average and our actual date of last frost will vary from year to year. Since half of the time in Zone 1a it frosts late in the year after June 15 be ready to cover your amaranthus if we have a late frost.

USDA Zone Info for Zone 1a

Here is the info for USDA Zone 1a.

Average Date of Last Frost (spring)June 15
Average Date of First Frost (fall)July 15
Lowest Expected Low-60°F
Highest Expected Low-55°F

This means that on a really cold year, the coldest it will get is -60°F. On most years you should be prepared to experience lows near -55°F.

Plants to Grow in Zone 1a

You may be interested in our other planting guides for Zone 1a.