When can I plant Watercress in Zone 8b

Before planting it is a good idea to find our USDA Zone info to determine our garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for our area.

You can determine when it's possible to plant watercress in Zone 8b by checking out the USDA zone info.


Planting Calendar for Watercress

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

Watercress are barely cold tolerant which tells us that you can get them planted just a bit earlier than other plants that might not handle the cold.

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 Zone 8b 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 grow to maturity. You can get started a little bit earlier by starting your watercress indoors.

Last Frost Date

The average date of last frost is March 15 in Zone 8b. In the coldest months of winter we can expect an average low temperature of 15°F.

Remember that our actual date of last frost may not be accurate from year to year because it is based on the USDA zone info for Zone 8b and it can change quite a bit from year to year. Half of the time in Zone 8b it frosts late in the year after March 15 so make sure that you are ready to protect your watercress if we have a late frost.

USDA Zone Info for Zone 8b

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)March 15
Average Date of First Frost (fall)November 15
Lowest Expected Low15°F
Highest Expected Low20°F

This means that on a really cold year, the coldest it will get is 15°F. On most years you should be prepared to experience lows near 20°F.

Plants to Grow in Zone 8b

You may be interested in our other planting guides for Zone 8b.