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

The best time to plant bell peppers in Castle Rock can be determined by referring to the USDA zone info.

Planting Calendar for Bell Peppers

Frost tolerance for bell peppers:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

It's probably not a good idea to plant bell peppers until after the last frost because they do not do well in cold weather.

The earliest that you can plant bell peppers 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 bell peppers and expect a good harvest is probably August. If you wait any later than that and your bell peppers may not have a chance to fully mature. Starting your bell peppers indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Castle Rock. It might get as low as -15°F during the coldest months of winter.

Since the USDA zone info for Castle Rock is just an average the actual date of last frost will vary from year to year. Half of the time in Castle Rock it frosts late in the year after April 15 so make sure that you are prepared to protect your bell peppers in the event of a surprise late frost.

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.