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 earliest that you can plant tall phlox in Rockland should be figured out by using the USDA zone info.

Planting Calendar for Tall Phlox

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

Tall Phlox do ok in some cold which tells us that you can plant them a little earlier in the year than more sensitive plants.

The earliest that you can plant tall phlox in Rockland 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 tall phlox and expect a good harvest is probably September. You probably don't want to wait any later than that or else your tall phlox may not have a chance to really do well. You can get started a few weeks earlier by starting your tall phlox indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Rockland. In the coldest months of winter you can expect an average low temperature of -10°F.

Since the USDA zone info for Rockland is an average the actual date of last frost changes from year to year. Half of the time in Rockland you get surprised by a frost after April 15 so make sure that you are ready to protect your tall phlox if you have one of those late frosts.

USDA Zone Info for Rockland

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Rockland

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