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.

By using the USDA zone info for Groton you should be able to figure out when you can plant amaranthus.

Planting Calendar for Amaranthus

Frost tolerance for amaranthus:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Since amaranthus do not do well in cold weather you need to wait until after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant amaranthus in Groton is April. However, you really should wait until May if you don't want to take any chances.

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

Last Frost Date

The average date of last frost is April 15 in Groton. You should expect an average low temperature of -5°F in the coldest months of winter.

Remember that USDA zone info for Groton is not always accurate and the actual date of last frost can change quite a bit from year to year. Half of the time in Groton there is a last frost after April 15 so make sure that you are ready to protect your amaranthus if you have a surprise late frost.

USDA Zone Info for Groton

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in Groton

You may be interested in your other planting guides for Groton.