The USDA Zone info is a great tool for gardeners to help us figure out 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.

By looking at the USDA zone info for Berthoud you should be able to figure out when it's possible to plant aubrieta.

Planting Calendar for Aubrieta

Frost tolerance for aubrieta:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Aubrieta can survive in mild cold which means that you can plant them just a bit earlier in the year than plants that are more sensitive to the cold.

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

The last month that you can plant aubrieta and expect a good harvest is probably September. Any later than that and your aubrieta may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your aubrieta indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Berthoud. It might get as low as -15°F during the coldest months of winter.

It's important to remember that USDA zone info for Berthoud is just an average and the actual date of last frost will vary from year to year. Since half of the time in Berthoud last frost occurs after April 15 be ready to protect your aubrieta in the event of a surprise late frost.

USDA Zone Info for Berthoud

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 Berthoud

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