One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

One way of figuring out when you can plant cosmos is to examine the USDA zone info for Deming.

Planting Calendar for Cosmos

Frost tolerance for cosmos:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Cosmos do ok in moderate cold which means that you can get them planted just a bit earlier than other frost tender plants.

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

The last month that you can plant cosmos and expect a good harvest is probably August. Any later than that and your cosmos may not have a chance to fully mature. You can get started a little bit earlier by starting your cosmos indoors.

Last Frost Date

The average date of last frost is March 15 in Deming. It might get as low as 10°F during the coldest months of winter.

Since the USDA zone info for Deming may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Half of the time in Deming it frosts late in the year after March 15 so just be sure to be ready to protect your cosmos if you have a surprise late frost.

USDA Zone Info for Deming

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 Deming

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