Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You can figure out when to plant celosia in Nashua by referring to the USDA zone info.

Planting Calendar for Celosia

Frost tolerance for celosia:	Not tolerant of frost.
When to plant:	After the last frost.

It's not a good idea to plant celosia until after the last frost has passed because they are not cold tolerant.

The earliest that you can plant celosia in Nashua 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 celosia and expect a good harvest is probably August. Any later than that and your celosia may not have a chance to grow to maturity. You can get started a little bit earlier by starting your celosia indoors.

Last Frost Date

The average date of last frost is April 15 in Nashua. It might get as low as -15°F during the coldest months of winter.

Since the USDA zone info for Nashua is just an average the actual date of last frost can change quite a bit from year to year. Since half of the time in Nashua you get a frost after April 15 be ready to cover your celosia if you have one of those late frosts.

USDA Zone Info for Nashua

Here is the info for USDA Zone 5b.

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

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Nashua

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