The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The USDA zone info for Cortez should be reffered to in order to determine when it's possible to plant marigold.

Planting Calendar for Marigold

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

Marigold require warm weather which tells us that it is important to wait until it warms up after the last frost before you can plant them.

The earliest that you can plant marigold in Cortez 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. You probably don't want to wait any later than that or else your marigold may not have a chance to grow to maturity. If you are starting your marigold indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

The average date of last frost is April 15 in Cortez. You should expect an average low temperature of -10°F in the coldest months of winter.

Remember that USDA zone info for Cortez is not always accurate and the actual date of last frost is different every year. Half of the time in Cortez you get surprised by a frost after April 15 so just be sure to be ready to cover your marigold in the event of a late frost.

USDA Zone Info for Cortez

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 Cortez

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