One of the best tools that you have as gardeners to help us figure out your gardening schedule is the 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.

You will be able to determine when it's a good idea to plant rhubarb by using the USDA zone info for West Covina.

Planting Calendar for Rhubarb

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

Since rhubarb are one of those plants that can tolerate a little bit of cold weather you can plant them a little bit earlier in the year than more sensitive plants.

The earliest that you can plant rhubarb in West Covina 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 rhubarb and expect a good harvest is probably October. If you wait any later than that and your rhubarb may not have a chance to fully mature. Starting your rhubarb indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is January 31 in West Covina. You should expect an average low temperature of 30°F in the coldest months of winter.

Always keep in mind that USDA zone info for West Covina is an average and the actual date of last frost is different every year. Since half of the time in West Covina it frosts late in the year after January 31 be ready to protect your rhubarb in the event of one of those late frosts.

USDA Zone Info for West Covina

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 West Covina

You may be interested in your other planting guides for West Covina.