When can I plant Common hollyhock in Zone 1b

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

A common way of estimating when it's a good idea to plant common hollyhock is to look at the USDA zone info for Zone 1b.


Planting Calendar for Common hollyhock

Frost tolerance for common hollyhock: Tolerant of some frost.
When you should plant them: Up to 5 weeks before last frost.

You can plant common hollyhock just a bit earlier in the year because they are one of those plants that can tolerate a little bit of cold weather.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant common hollyhock
Possibly ok, but a risky time to plant common hollyhock
Probably not a good time to plant common hollyhock

The earliest that you can plant common hollyhock in Zone 1b is May. However, you really should wait until June if you don't want to take any chances.

The last month that you can plant common hollyhock and expect a good harvest is probably July. If you wait any later than that and your common hollyhock may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your common hollyhock indoors.

Last Frost Date

The average date of last frost is June 15 in Zone 1b. In the coldest months of winter we should expect an average low temperature of -55°F.

It's important to remember that USDA zone info for Zone 1b is just an average and our actual date of last frost changes from year to year. Since half of the time in Zone 1b last frost occurs after June 15 be ready to protect your common hollyhock if we have a surprise late frost.

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 our other planting guides for Zone 1b.