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

You should be able to figure out when it's a good idea to plant alternanthera by reviewing the USDA zone info for Woonsocket.

Planting Calendar for Alternanthera

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

Alternanthera are not cold tolerant which means that you really should wait until it warms up after the last frost before you can plant them.

The earliest that you can plant alternanthera in Woonsocket 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 alternanthera and expect a good harvest is probably August. You probably don't want to wait any later than that or else your alternanthera may not have a chance to really do well. You can get started a couple of weeks earlier by starting your alternanthera indoors.

Last Frost Date

On average the last frost is on April 15 in Woonsocket. It might get as low as -10°F during the coldest months of winter.

Remember that the actual date of last frost may not be accurate from year to year because it is based on the USDA zone info for Woonsocket and it changes from year to year. Since half of the time in Woonsocket it frosts late in the year after April 15 be ready to cover your alternanthera in the event of a surprise late frost.

USDA Zone Info for Woonsocket

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Woonsocket

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