Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A way of determining when to plant marigold is to use the USDA zone info for Sweetwater.

Planting Calendar for Marigold

Frost tolerance for marigold:	Not tolerant of frost.
When to plant:	After the last frost.

It's a bad idea to plant marigold until after the last frost has passed because they require warm weather.

The earliest that you can plant marigold in Sweetwater is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant marigold and expect a good harvest is probably August. If you wait any later than that and your marigold may not have a chance to fully mature. If you are starting your marigold indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

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

Since the USDA zone info for Sweetwater may not be accurate from year to year the actual date of last frost changes from year to year. Half of the time in Sweetwater you get a frost after April 15 so make sure that you are ready to cover your marigold in the event of a surprise late frost.

USDA Zone Info for Sweetwater

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 Sweetwater

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