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 should be able to estimate when it's possible to plant snow-in summer by referring to the USDA zone info for Holly.

Planting Calendar for Snow-in Summer

Frost tolerance for snow-in summer:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Since snow-in summer are moderately cold tolerant you can plant them just a bit earlier in the year than more sensitive plants.

The earliest that you can plant snow-in summer in Holly is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant snow-in summer and expect a good harvest is probably September. You probably don't want to wait any later than that or else your snow-in summer may not have a chance to really do well. You can get started a little bit earlier by starting your snow-in summer indoors.

Last Frost Date

The average date of last frost is April 15 in Holly. It might get as low as -10°F during the coldest months of winter.

Keep in mind that USDA zone info for Holly is not always accurate and the actual date of last frost is different every year. Half of the time in Holly you get surprised by a frost after April 15 so always be ready to cover your snow-in summer if you have a surprise late frost.

USDA Zone Info for Holly

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 Holly

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