The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

It's a good idea to figure out when to plant neeps by referring to the USDA zone info for Boulder.

Planting Calendar for Neeps

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

You really shouldn't plant neeps until after the last frost when the weather gets warmer because they require warm weather.

The earliest that you can plant neeps in Boulder 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 neeps and expect a good harvest is probably August. You probably don't want to wait any later than that or else your neeps may not have a chance to fully mature. You can get started a few weeks earlier by starting your neeps indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Boulder. In the coldest months of winter you can expect an average low temperature of -15°F.

Always keep in mind that the actual date of last frost is just an average because it is based on the USDA zone info for Boulder and it can change quite a bit from year to year. Half of the time in Boulder there is a last frost after April 15 so make sure that you are prepared to protect your neeps if you have a late frost.

USDA Zone Info for Boulder

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 Boulder

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