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.

In Romulus you can estimate when you can plant digitalis by referring to the USDA zone info.

Planting Calendar for Digitalis

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

Digitalis are moderately cold tolerant which means that you can plant them a little bit earlier than more sensitive plants.

The earliest that you can plant digitalis in Romulus 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 digitalis and expect a good harvest is probably September. If you wait any later than that and your digitalis may not have a chance to really do well. Starting your digitalis indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost is on April 15 in Romulus. It might get as low as -10°F during the coldest months of winter.

Since the USDA zone info for Romulus may not be accurate from year to year the actual date of last frost changes from year to year. Half of the time in Romulus there is a last frost after April 15 so just be sure to be ready to cover your digitalis in the event of a surprise late frost.

USDA Zone Info for Romulus

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Romulus

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