Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Palmetto you can estimate when you can plant pennyroyal by using the USDA zone info.

Planting Calendar for Pennyroyal

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

Since pennyroyal are very cold tolerant you can plant them earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant pennyroyal in Palmetto 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 pennyroyal and expect a good harvest is probably September. You probably don't want to wait any later than that or else your pennyroyal may not have a chance to fully mature. Starting your pennyroyal indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Palmetto. You should expect an average low temperature of 5°F in the coldest months of winter.

Always keep in mind that USDA zone info for Palmetto is an average and the actual date of last frost will vary from year to year. Half of the time in Palmetto it frosts late in the year after April 15 so be sure to be ready to cover your pennyroyal in the event of a late frost.

USDA Zone Info for Palmetto

Here is the info for USDA Zone 7b.

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

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

Plants to Grow in Palmetto

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