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.

The USDA zone info for Allentown can be reffered to in order to figure out when it's possible to plant bittercress.

Planting Calendar for Bittercress

Frost tolerance for bittercress:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Since bittercress are barely cold tolerant you can plant them a bit earlier in the year than more sensitive plants.

The earliest that you can plant bittercress in Allentown is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant bittercress and expect a good harvest is probably August. You probably don't want to wait any later than that or else your bittercress may not have a chance to grow to maturity. Starting your bittercress indoors is a great way to get them started a few weeks earlier.

Last Frost Date

In Allentown the average date of last frost happens on April 15. You can expect an average low temperature of -5°F in the coldest months of winter.

Since the USDA zone info for Allentown is not always accurate the actual date of last frost will vary from year to year. Since half of the time in Allentown you get a frost after April 15 be ready to protect your bittercress if you have one of those late frosts.

USDA Zone Info for Allentown

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 Allentown

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