The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. 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 Merrill can be reffered to in order to figure out when it's a good idea to plant broccoli.

Planting Calendar for Broccoli

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

Since broccoli are one of those plants that can tolerate a little bit of cold weather you can plant them a little bit earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant broccoli in Merrill 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. You probably don't want to wait any later than that or else your broccoli may not have a chance to really do well. You can get started a few weeks earlier by starting your broccoli indoors.

Last Frost Date

On average all chance of frost has passed is on May 15 in Merrill. You should expect an average low temperature of -30°F in the coldest months of winter.

Keep in mind that USDA zone info for Merrill may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Half of the time in Merrill it frosts late in the year after May 15 so make sure that you are ready to protect your broccoli if you have a surprise late frost.

USDA Zone Info for Merrill

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 Merrill

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