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.

The USDA zone info for Colusa can be read to estimate when it's a good idea to plant didiscus.

Planting Calendar for Didiscus

Frost tolerance for didiscus:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

You can plant didiscus just a tiny bit earlier in the year because they are barely cold tolerant.

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

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

Last Frost Date

On average all chance of frost has passed is on February 15 in Colusa. It might get as low as 25°F during the coldest months of winter.

Since the USDA zone info for Colusa is not always accurate the actual date of last frost will vary from year to year. Half of the time in Colusa you get surprised by a frost after February 15 so always be ready to cover your didiscus in the event of a surprise late frost.

USDA Zone Info for Colusa

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Colusa

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