One of the first steps you take when you are figuring out your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A common way of estimating when you can plant romanesco is to look at the USDA zone info for Winona.

Planting Calendar for Romanesco

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

Since romanesco are moderately cold tolerant you can plant them just a bit earlier in the year than other frost tender plants.

The earliest that you can plant romanesco in Winona 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. Any later than that and your romanesco may not have a chance to grow to maturity. Starting your romanesco indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is May 15 in Winona. You can expect an average low temperature of -25°F in the coldest months of winter.

Since the USDA zone info for Winona may not be accurate from year to year the actual date of last frost changes from year to year. Half of the time in Winona there is a last frost after May 15 so make sure that you are prepared to protect your romanesco in the event of a surprise late frost.

USDA Zone Info for Winona

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Winona

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