Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. 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 Great Falls you will be able to determine when to plant anagallis.

Planting Calendar for Anagallis

Frost tolerance for anagallis:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Since anagallis are one of those plants that can tolerate a tiny bit of cold weather you can plant them just a tiny bit earlier in the year than other plants that might not handle the cold.

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

Last Frost Date

On average all chance of frost has passed is on May 15 in Great Falls. It might get as low as -30°F during the coldest months of winter.

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 Great Falls and it will vary from year to year. Half of the time in Great Falls last frost occurs after May 15 so be sure to be ready to protect your anagallis if you have a late frost.

USDA Zone Info for Great Falls

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-30°F
Highest Expected Low	-25°F

This means that on a really cold year, the coldest it will get is -30°F. On most years you should be prepared to experience lows near -25°F.

Plants to Grow in Great Falls

You may be interested in your other planting guides for Great Falls.