The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You can determine when to plant creeping phlox in Watertown by reviewing the USDA zone info.

Planting Calendar for Creeping Phlox

Frost tolerance for creeping phlox:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Creeping Phlox tend to make it in a bit of cold which tells us that you can plant them quite a bit earlier in the year than other frost tender plants.

The earliest that you can plant creeping phlox in Watertown is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant creeping phlox and expect a good harvest is probably September. You probably don't want to wait any later than that or else your creeping phlox may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your creeping phlox indoors.

Last Frost Date

The average date of last frost is April 15 in Watertown. You should expect an average low temperature of -20°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Watertown 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 Watertown there is a last frost after April 15 be ready to cover your creeping phlox in the event of one of those late frosts.

USDA Zone Info for Watertown

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in Watertown

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