The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You should be able to figure out when it's possible to plant balsam by referring to the USDA zone info for Keene.

Planting Calendar for Balsam

Frost tolerance for balsam:	Not tolerant of frost.
When to plant:	After the last frost has passed.

You can not plant balsam until after the last frost because they require warm weather.

The earliest that you can plant balsam in Keene 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 balsam and expect a good harvest is probably August. You probably don't want to wait any later than that or else your balsam may not have a chance to grow to maturity. Starting your balsam indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is March 15 in Keene. In the coldest months of winter you can expect an average low temperature of 10°F.

Remember that USDA zone info for Keene is an average and the actual date of last frost will vary from year to year. Half of the time in Keene it frosts late in the year after March 15 so make sure that you are prepared to cover your balsam if you have a surprise late frost.

USDA Zone Info for Keene

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°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 15°F.

Plants to Grow in Keene

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