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.

It's a good idea to estimate when to plant millet by reviewing the USDA zone info for Castle Rock.

Planting Calendar for Millet

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

It's not a good idea to plant millet until after the last frost has passed because they do not do well in cold weather.

The earliest that you can plant millet in Castle Rock 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 millet and expect a good harvest is probably August. Any later than that and your millet may not have a chance to really do well. Starting your millet indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

In Castle Rock the average date of last frost happens on April 15. You should expect an average low temperature of -15°F in the coldest months of winter.

Since the USDA zone info for Castle Rock is an average the actual date of last frost is different every year. Half of the time in Castle Rock it frosts late in the year after April 15 so be sure to be ready to cover your millet in the event of one of those late frosts.

USDA Zone Info for Castle Rock

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-15°F
Highest Expected Low	-10°F

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Castle Rock

You may be interested in your other planting guides for Castle Rock.