One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Conroe you can determine when you can plant hollyhocks by looking at the USDA zone info.

Planting Calendar for Hollyhocks

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

You can plant hollyhocks a little earlier in the year because they are moderately cold tolerant.

The earliest that you can plant hollyhocks in Conroe 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 hollyhocks and expect a good harvest is probably September. You probably don't want to wait any later than that or else your hollyhocks may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your hollyhocks indoors.

Last Frost Date

The average date of last frost is March 15 in Conroe. It might get as low as 15°F during the coldest months of winter.

Always keep in mind that USDA zone info for Conroe may not be accurate from year to year and the actual date of last frost is different every year. Half of the time in Conroe it frosts late in the year after March 15 so just be sure to be ready to protect your hollyhocks if you have one of those late frosts.

USDA Zone Info for Conroe

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°F

This means that on a really cold year, the coldest it will get is 15°F. On most years you should be prepared to experience lows near 20°F.

Plants to Grow in Conroe

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