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 phlox in Marshall should be determined by checking out the USDA zone info.

Planting Calendar for Phlox

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

Phlox do well in moderate cold which tells us that you can start planting them earlier than other frost tender plants.

The earliest that you can plant phlox in Marshall 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. If you wait any later than that and your phlox may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your phlox indoors.

Last Frost Date

On average the last frost has passed is on March 15 in Marshall. It might get as low as 15°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Marshall is an average and the actual date of last frost will vary from year to year. Since half of the time in Marshall last frost occurs after March 15 be ready to cover your phlox in the event of one of those late frosts.

USDA Zone Info for Marshall

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°F

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

Plants to Grow in Marshall

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