One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The USDA zone info for Lewistown can be looked at to figure out when you can plant broccoli.

Planting Calendar for Broccoli

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

Broccoli are moderately cold tolerant which tells us that you can plant them earlier than other frost tender plants.

The earliest that you can plant broccoli in Lewistown 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 broccoli and expect a good harvest is probably August. If you wait any later than that and your broccoli may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your broccoli indoors.

Last Frost Date

On average all chance of frost has passed is on May 15 in Lewistown. It might get as low as -30°F during the coldest months of winter.

Just be sure to remember that the actual date of last frost is an average because it is based on the USDA zone info for Lewistown and it can change quite a bit from year to year. Half of the time in Lewistown there is a last frost after May 15 so make sure that you are prepared to protect your broccoli in the event of one of those late frosts.

USDA Zone Info for Lewistown

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 Lewistown

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