One of the first steps you take when you are getting a good idea your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The first chance to plant radishes in Sierra Madre should be determined by using 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 other frost tender plants.

The earliest that you can plant radishes in Sierra Madre 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. 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 has passed is on January 31 in Sierra Madre. You can expect an average low temperature of 30°F in the coldest months of winter.

Since the USDA zone info for Sierra Madre is an average the actual date of last frost can change quite a bit from year to year. Half of the time in Sierra Madre it frosts late in the year after January 31 so always be ready to cover your radishes in the event of a surprise late frost.

USDA Zone Info for Sierra Madre

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	30°F
Highest Expected Low	35°F

This means that on a really cold year, the coldest it will get is 30°F. On most years you should be prepared to experience lows near 35°F.

Plants to Grow in Sierra Madre

You may be interested in your other planting guides for Sierra Madre.