One of the first steps you take when you are getting a good idea your gardening schedule is find your 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.

It's a good idea to determine when you can plant romanesco by referring to the USDA zone info for Zimmerman.

Planting Calendar for Romanesco

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

Romanesco tend to make it in some cold which means that you can plant them a bit earlier in the year than other plants that might not handle the cold.

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

Last Frost Date

On average the last frost is on May 15 in Zimmerman. You can expect an average low temperature of -30°F in the coldest months of winter.

Keep in mind that USDA zone info for Zimmerman may not be accurate from year to year and the actual date of last frost is different every year. Since half of the time in Zimmerman it frosts late in the year after May 15 be ready to protect your romanesco in the event of one of those late frosts.

USDA Zone Info for Zimmerman

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 Zimmerman

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