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When to Plant Mustard greens in Watertown, SD

One of the best tools that you have as gardeners to help us figure out 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.

The USDA zone info for Watertown should be reffered to in order to determine when it's a good idea to plant mustard greens.


Planting Calendar for Mustard greens

Frost tolerance for mustard greens: Tolerant of some frost.
When to plant: Up to 5 weeks before last frost.

Since mustard greens are moderately cold tolerant you can plant them a little bit earlier in the year than other frost tender plants.

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

The earliest that you can plant mustard greens in Watertown 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 mustard greens and expect a good harvest is probably August. If you wait any later than that and your mustard greens may not have a chance to fully mature. Starting your mustard greens indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on May 15 in Watertown. In the coldest months of winter you should expect an average low temperature of -30°F.

Keep in mind that the actual date of last frost may not be accurate from year to year because it is based on the USDA zone info for Watertown and it will vary from year to year. Half of the time in Watertown you get a frost after May 15 so make sure that you are ready to cover your mustard greens in the event of a late frost.

USDA Zone Info for Watertown

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)May 15
Average Date of First Frost (fall)September 15
Lowest Expected Low-30°F
Highest Expected Low-25°F

This means that on a really cold year, the coldest it will get is -30°F. On most years you should be prepared to experience lows near -25°F.

Plants to Grow in Watertown

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