One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Selinsgrove you can figure out when to plant purple rock cress by looking at the USDA zone info.

Planting Calendar for Purple Rock Cress

Frost tolerance for purple rock cress:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Since purple rock cress do well in cold you can plant them much earlier in the year than more sensitive plants.

The earliest that you can plant purple rock cress in Selinsgrove 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 purple rock cress and expect a good harvest is probably September. You probably don't want to wait any later than that or else your purple rock cress may not have a chance to fully mature. You can get started a little bit earlier by starting your purple rock cress indoors.

Last Frost Date

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

Since the USDA zone info for Selinsgrove is just an average the actual date of last frost is different every year. Since half of the time in Selinsgrove it frosts late in the year after April 15 be ready to cover your purple rock cress in the event of a late frost.

USDA Zone Info for Selinsgrove

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°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 0°F.

Plants to Grow in Selinsgrove

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