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.

In Conroe you can estimate when it's the best time to plant cardinal flower by reviewing the USDA zone info.

Planting Calendar for Cardinal Flower

Frost tolerance for cardinal flower:	Not tolerant of frost.
When to plant:	After the last frost has passed.

You should not plant cardinal flower until after the last frost because they require warm weather.

The earliest that you can plant cardinal flower in Conroe is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant cardinal flower and expect a good harvest is probably August. If you wait any later than that and your cardinal flower may not have a chance to fully mature. Starting your cardinal flower indoors is a great way to get them started a little bit earlier.

Last Frost Date

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

Since the USDA zone info for Conroe is not always accurate the actual date of last frost is different every year. Half of the time in Conroe last frost occurs after March 15 so always be ready to cover your cardinal flower in the event of a surprise late frost.

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.