When to Plant Watercress in Carnegie, PA

One of the first steps you take when you are determining your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

One way of determining when you can plant watercress is to check out the USDA zone info for Carnegie.


Planting Calendar for Watercress

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

You can plant watercress just a tiny bit earlier in the year because they are one of those plants that can tolerate a tiny bit of cold weather.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant watercress
Possibly ok, but a risky time to plant watercress
Probably not a good time to plant watercress

The earliest that you can plant watercress in Carnegie 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 watercress and expect a good harvest is probably August. If you wait any later than that and your watercress may not have a chance to really do well. You can get started a few weeks earlier by starting your watercress indoors.

Last Frost Date

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

Since the USDA zone info for Carnegie is not always accurate the actual date of last frost will vary from year to year. Half of the time in Carnegie last frost occurs after April 15 so be sure to be ready to cover your watercress in the event of a surprise late frost.

USDA Zone Info for Carnegie

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 Low0°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 Carnegie

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