The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Stillwater you can determine when it's a good idea to plant bittercress by looking at the USDA zone info.

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 do ok in moderate cold you can plant them just a tiny bit earlier in the year than other plants that might not handle the cold.

The earliest that you can plant bittercress in Stillwater 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. If you wait any later than that and your bittercress may not have a chance to really do well. If you are starting your bittercress indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

On average all chance of frost has passed is on April 15 in Stillwater. In the coldest months of winter you should expect an average low temperature of 0°F.

Remember that USDA zone info for Stillwater is just an average and the actual date of last frost will vary from year to year. Since half of the time in Stillwater you get surprised by a frost after April 15 be ready to protect your bittercress if you have a surprise late frost.

USDA Zone Info for Stillwater

Here is the info for USDA Zone 7a.

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

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in Stillwater

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