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 Watertown can be read to estimate when to plant cauliflower.

Planting Calendar for Cauliflower

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

Cauliflower tend to make it in mild cold which tells us that you can plant them a little bit earlier in the year than other plants that might not handle the cold.

The earliest that you can plant cauliflower in Watertown 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 cauliflower and expect a good harvest is probably August. You probably don't want to wait any later than that or else your cauliflower may not have a chance to grow to maturity. Starting your cauliflower indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

The average date of last frost is May 15 in Watertown. It might get as low as -25°F during the coldest months of winter.

Since the USDA zone info for Watertown is just an average the actual date of last frost can change quite a bit from year to year. Half of the time in Watertown last frost occurs after May 15 so make sure that you are prepared to protect your cauliflower in the event of one of those late frosts.

USDA Zone Info for Watertown

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 Watertown

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