When can I plant Broccoli in Zone 5a

One of the best tools that we have as gardeners to help us estimate our 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 our area.

You will be able to figure out when you can plant broccoli by reviewing the USDA zone info for Zone 5a.


Planting Calendar for Broccoli

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

Broccoli do well in moderate cold which means that you can get them planted earlier than other frost tender plants.

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

The earliest that you can plant broccoli in Zone 5a 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 broccoli and expect a good harvest is probably September. You probably don't want to wait any later than that or else your broccoli may not have a chance to fully mature. You can get started a little bit earlier by starting your broccoli indoors.

Last Frost Date

The average date of last frost is April 15 in Zone 5a. In the coldest months of winter we should expect an average low temperature of -20°F.

Remember that our actual date of last frost is not always accurate because it is based on the USDA zone info for Zone 5a and it is different every year. Half of the time in Zone 5a there is a last frost after April 15 so be sure to be ready to protect your broccoli in the event of a late frost.

USDA Zone Info for Zone 5a

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)April 15
Average Date of First Frost (fall)October 15
Lowest Expected Low-20°F
Highest Expected Low-15°F

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

Plants to Grow in Zone 5a

You may be interested in our other planting guides for Zone 5a.