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.

In Maryland Heights you can estimate when you can plant tritoma by looking at the USDA zone info.

Planting Calendar for Tritoma

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

Tritoma tend to make it in pretty solid cold which tells us that you can plant them earlier in the year than more sensitive plants.

The earliest that you can plant tritoma in Maryland Heights 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 tritoma and expect a good harvest is probably September. If you wait any later than that and your tritoma may not have a chance to grow to maturity. You can get started a little bit earlier by starting your tritoma indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Maryland Heights. In the coldest months of winter you can expect an average low temperature of -10°F.

Since the USDA zone info for Maryland Heights is just an average the actual date of last frost will vary from year to year. Half of the time in Maryland Heights it frosts late in the year after April 15 so be sure to be ready to protect your tritoma in the event of a late frost.

USDA Zone Info for Maryland Heights

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 Maryland Heights

You may be interested in your other planting guides for Maryland Heights.