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

In Tomball you can figure out when you can plant radishes by referring to the USDA zone info.

Planting Calendar for Radishes

Frost tolerance for radishes:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Since radishes do well in cold you can plant them quite a bit earlier in the year than more sensitive plants.

The earliest that you can plant radishes in Tomball is January. However, you really should wait until February if you don't want to take any chances.

The last month that you can plant radishes and expect a good harvest is probably October. If you wait any later than that and your radishes may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your radishes indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on February 15 in Tomball. You can expect an average low temperature of 20°F in the coldest months of winter.

Since the USDA zone info for Tomball may not be accurate from year to year the actual date of last frost is different every year. Since half of the time in Tomball you get surprised by a frost after February 15 be ready to protect your radishes in the event of a late frost.

USDA Zone Info for Tomball

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

This means that on a really cold year, the coldest it will get is 20°F. On most years you should be prepared to experience lows near 25°F.

Plants to Grow in Tomball

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