When can I plant Phlox in Greenville, IL

The USDA Zone info is a great tool for gardeners to help us estimate our gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for our area.

In Greenville you can determine when it's the best time to plant phlox by checking out the USDA zone info.

Planting Calendar for Phlox

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

Phlox are moderately cold tolerant which tells us that you can start planting them earlier than plants that are more sensitive to the cold.

A good time to plant phlox
Possibly ok, but a risky time to plant phlox
Probably not a good time to plant phlox

The earliest that you can plant phlox in Greenville 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 phlox and expect a good harvest is probably September. You probably don't want to wait any later than that or else your phlox may not have a chance to fully mature. You can get started a little bit earlier by starting your phlox indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Greenville. In the coldest months of winter we should expect an average low temperature of -10°F.

Keep in mind that USDA zone info for Greenville is just an average and our actual date of last frost is different every year. Since half of the time in Greenville it frosts late in the year after April 15 be ready to cover your phlox in the event of a surprise late frost.

USDA Zone Info for Greenville

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 Greenville

You may be interested in our other planting guides for Greenville.