The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The USDA zone info for La Porte can be read to estimate when to plant dahlias.

Planting Calendar for Dahlias

Frost tolerance for dahlias:	Not tolerant of frost.
When to plant:	After the last frost.

Since dahlias are not cold tolerant you have to wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant dahlias in La Porte 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 dahlias and expect a good harvest is probably August. If you wait any later than that and your dahlias may not have a chance to really do well. If you are starting your dahlias indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

The average date of last frost is April 15 in La Porte. In the coldest months of winter you can expect an average low temperature of -10°F.

Since the USDA zone info for La Porte is an average the actual date of last frost changes from year to year. Since half of the time in La Porte you get a frost after April 15 be ready to protect your dahlias in the event of one of those late frosts.

USDA Zone Info for La Porte

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in La Porte

You may be interested in your other planting guides for La Porte.