When can I plant Sweet Williams in Zone 7a

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.

One way of estimating when it's possible to plant sweet williams is to use the USDA zone info for Zone 7a.


Planting Calendar for Sweet Williams

Frost tolerance for sweet williams: Tolerant of some frost.
When you should plant them: Up to 5 weeks before last frost.

Sweet Williams do well in moderate cold which tells us that you can plant them earlier than more sensitive plants.

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

The earliest that you can plant sweet williams in Zone 7a is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant sweet williams and expect a good harvest is probably September. You probably don't want to wait any later than that or else your sweet williams may not have a chance to fully mature. Starting your sweet williams indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Zone 7a. In the coldest months of winter we should expect an average low temperature of 0°F.

Since the USDA zone info for Zone 7a is just an average our actual date of last frost will vary from year to year. Since half of the time in Zone 7a we get surprised by a frost after April 15 be ready to protect your sweet williams if we have a surprise late frost.

USDA Zone Info for Zone 7a

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 Low0°F
Highest Expected Low5°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 Zone 7a

You may be interested in our other planting guides for Zone 7a.