One of the best tools that you have as gardeners to help us determine your gardening schedule is the 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.

It's possible to determine when it's a good idea to plant marigold by referring to the USDA zone info for Mount Vernon.

Planting Calendar for Marigold

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

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

The earliest that you can plant marigold in Mount Vernon 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. Any later than that and your marigold may not have a chance to really do well. Starting your marigold indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost is on March 15 in Mount Vernon. It might get as low as 10°F during the coldest months of winter.

Always keep in mind that USDA zone info for Mount Vernon is an average and the actual date of last frost is different every year. Half of the time in Mount Vernon there is a last frost after March 15 so be sure to be ready to protect your marigold if you have a surprise late frost.

USDA Zone Info for Mount Vernon

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°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 15°F.

Plants to Grow in Mount Vernon

You may be interested in your other planting guides for Mount Vernon.