One of the first steps you take when you are making a decision about your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You will be able to determine when it's the best time to plant common hollyhock by referring to the USDA zone info for Berlin.

Planting Calendar for Common hollyhock

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

Since common hollyhock are moderately cold tolerant you can plant them a little earlier in the year than more sensitive plants.

The earliest that you can plant common hollyhock in Berlin is February. However, you really should wait until March 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 September. Any later than that and your common hollyhock may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your common hollyhock indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Berlin. It might get as low as 0°F during the coldest months of winter.

Since the USDA zone info for Berlin is just an average the actual date of last frost is different every year. Since half of the time in Berlin there is a last frost after April 15 be ready to protect your common hollyhock if you have one of those late frosts.

USDA Zone Info for Berlin

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	0°F
Highest Expected Low	5°F

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in Berlin

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