One of the best tools that you have as gardeners to help us estimate 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.

You should be able to determine when you can plant anagallis by checking out the USDA zone info for Columbia.

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.

Anagallis tend to make it in some cold which means that you can plant them slightly earlier in the year than plants that are more sensitive to the cold.

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

Last Frost Date

The average date of last frost is March 15 in Columbia. It might get as low as 10°F during the coldest months of winter.

Keep in mind that USDA zone info for Columbia is just an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Columbia you get surprised by a frost after March 15 so always be ready to cover your anagallis in the event of a surprise late frost.

USDA Zone Info for Columbia

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°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 15°F.

Plants to Grow in Columbia

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