Before planting it is a good idea to find your USDA Zone info to determine 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.

A way of getting a good idea when it's a good idea to plant marigold is to look at the USDA zone info for Atchison.

Planting Calendar for Marigold

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

Marigold do not do well in cold weather which means that you have to wait until it warms up after the last frost before you can plant them.

The earliest that you can plant marigold in Atchison 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 fully mature. You can get started a little bit earlier by starting your marigold indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Atchison. It might get as low as -10°F during the coldest months of winter.

Since the USDA zone info for Atchison is not always accurate the actual date of last frost is different every year. Since half of the time in Atchison you get surprised by a frost after April 15 be ready to cover your marigold in the event of a late frost.

USDA Zone Info for Atchison

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 Atchison

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