Before planting it is a good idea to find your USDA Zone info to figure out 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.

The USDA zone info for Hempstead can be reffered to in order to estimate when it's the best time to plant dahlia.

Planting Calendar for Dahlia

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

Since dahlia are not cold tolerant it's important to wait until after the last frost before you can plant them.

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

Last Frost Date

On average the last frost has passed is on April 15 in Hempstead. You can expect an average low temperature of 5°F in the coldest months of winter.

Remember that USDA zone info for Hempstead is an average and the actual date of last frost can change quite a bit from year to year. Since half of the time in Hempstead last frost occurs after April 15 be ready to protect your dahlia in the event of a surprise late frost.

USDA Zone Info for Hempstead

Here is the info for USDA Zone 7b.

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

Plants to Grow in Hempstead

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