The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You should be able to figure out when you can plant common hollyhock by reviewing the USDA zone info for Toppenish.

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 do well in moderate cold you can plant them a little earlier in the year than other plants that might not handle the cold.

The earliest that you can plant common hollyhock in Toppenish 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. You probably don't want to wait any later than that or else your common hollyhock may not have a chance to grow to maturity. If you are starting your common hollyhock indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Toppenish. You should expect an average low temperature of 0°F in the coldest months of winter.

Always keep in mind that USDA zone info for Toppenish is just an average and the actual date of last frost is different every year. Since half of the time in Toppenish it frosts late in the year after April 15 be ready to protect your common hollyhock if you have a surprise late frost.

USDA Zone Info for Toppenish

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 Toppenish

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