Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

By referring to the USDA zone info for Terre Haute you will be able to determine when it's a good idea to plant regal geranium.

Planting Calendar for Regal Geranium

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

Regal Geranium do ok in moderate cold which tells us that you can plant them slightly earlier than other frost tender plants.

The earliest that you can plant regal geranium in Terre Haute 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 regal geranium and expect a good harvest is probably August. You probably don't want to wait any later than that or else your regal geranium may not have a chance to grow to maturity. You can get started a little bit earlier by starting your regal geranium indoors.

Last Frost Date

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

Since the USDA zone info for Terre Haute is an average the actual date of last frost can change quite a bit from year to year. Since half of the time in Terre Haute you get a frost after April 15 be ready to protect your regal geranium if you have a late frost.

USDA Zone Info for Terre Haute

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 Terre Haute

You may be interested in your other planting guides for Terre Haute.