One of the first steps you take when you are determining your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

By using the USDA zone info for Trinity you will be able to estimate when you can plant calendula.

Planting Calendar for Calendula

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

You can plant calendula just a bit earlier in the year because they are one of those plants that can tolerate a little bit of cold weather.

The earliest that you can plant calendula in Trinity 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 calendula and expect a good harvest is probably September. If you wait any later than that and your calendula may not have a chance to really do well. You can get started a few weeks earlier by starting your calendula indoors.

Last Frost Date

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

Keep in mind that USDA zone info for Trinity is not always accurate and the actual date of last frost is different every year. Since half of the time in Trinity you get a frost after April 15 be ready to cover your calendula in the event of a late frost.

USDA Zone Info for Trinity

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 Trinity

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