One of the first steps you take when you are determining 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.

One way of making a decision about when you can plant banana is to examine the USDA zone info for Watertown.

Planting Calendar for Banana

Frost tolerance for banana:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Since banana require warm weather you really should wait until after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant banana in Watertown is May. However, you really should wait until June if you don't want to take any chances.

The last month that you can plant banana and expect a good harvest is probably August. Any later than that and your banana may not have a chance to fully mature. Starting your banana indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

On average the last frost is on May 15 in Watertown. In the coldest months of winter you should expect an average low temperature of -30°F.

Since the USDA zone info for Watertown is just an average the actual date of last frost changes from year to year. Since half of the time in Watertown last frost occurs after May 15 be ready to protect your banana in the event of one of those late frosts.

USDA Zone Info for Watertown

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 Watertown

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