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.

In Zone 1b you can figure out when it's a good idea to plant regal geranium by using the USDA zone info.

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 very little cold which means that you can plant them a bit earlier in the year than other frost tender plants.

The earliest that you can plant regal geranium in Zone 1b is June. However, you really should wait until July 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 July. If you wait any later than that and your regal geranium may not have a chance to really do well. If you are starting your regal geranium indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

The average date of last frost is June 15 in Zone 1b. It might get as low as -55°F during the coldest months of winter.

Remember that USDA zone info for Zone 1b may not be accurate from year to year and the actual date of last frost is different every year. Since half of the time in Zone 1b it frosts late in the year after June 15 be ready to cover your regal geranium if you have one of those late frosts.

USDA Zone Info for Zone 1b

Here is the info for USDA Zone 1b.

Average Date of Last Frost (spring)	June 15
Average Date of First Frost (fall)	July 15
Lowest Expected Low	-55°F
Highest Expected Low	-50°F

This means that on a really cold year, the coldest it will get is -55°F. On most years you should be prepared to experience lows near -50°F.

Plants to Grow in Zone 1b

You may be interested in your other planting guides for Zone 1b.