One of the first steps you take when you are determining your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A common way of estimating when you can plant radicchio is to examine the USDA zone info for Thousand Oaks.

Planting Calendar for Radicchio

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

Radicchio can survive in a little bit of cold which tells us that you can plant them a little earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant radicchio in Thousand Oaks 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 radicchio and expect a good harvest is probably October. Any later than that and your radicchio may not have a chance to fully mature. If you are starting your radicchio indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

The average date of last frost is January 31 in Thousand Oaks. It might get as low as 30°F during the coldest months of winter.

Keep in mind that USDA zone info for Thousand Oaks is just an average and the actual date of last frost is different every year. Half of the time in Thousand Oaks there is a last frost after January 31 so always be ready to cover your radicchio in the event of one of those late frosts.

USDA Zone Info for Thousand Oaks

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 Thousand Oaks

You may be interested in your other planting guides for Thousand Oaks.