One of the first steps you take when you are figuring out your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By looking at the USDA zone info for Vail it's a good idea to determine when to plant diascia.

Planting Calendar for Diascia

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

Diascia do ok in mild cold which means that you can plant them just a bit earlier in the year than more sensitive plants.

The earliest that you can plant diascia in Vail 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 diascia and expect a good harvest is probably August. If you wait any later than that and your diascia may not have a chance to fully mature. You can get started a few weeks earlier by starting your diascia indoors.

Last Frost Date

The average date of last frost is May 15 in Vail. It might get as low as -25°F during the coldest months of winter.

Since the USDA zone info for Vail may not be accurate from year to year the actual date of last frost is different every year. Since half of the time in Vail you get a frost after May 15 be ready to cover your diascia if you have a late frost.

USDA Zone Info for Vail

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Vail

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