One of the best tools that you have as gardeners to help us estimate 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.

By looking at the USDA zone info for Covina you will be able to determine when to plant ornamental grasses.

Planting Calendar for Ornamental Grasses

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

Since ornamental grasses are barely cold tolerant you can plant them just a tiny bit earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant ornamental grasses in Covina 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 ornamental grasses and expect a good harvest is probably September. Any later than that and your ornamental grasses may not have a chance to really do well. If you are starting your ornamental grasses indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

In Covina the average date of last frost happens on January 31. You can expect an average low temperature of 30°F in the coldest months of winter.

Keep in mind that the actual date of last frost may not be accurate from year to year because it is based on the USDA zone info for Covina and it can change quite a bit from year to year. Half of the time in Covina you get a frost after January 31 so make sure that you are prepared to cover your ornamental grasses if you have a late frost.

USDA Zone Info for 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 Covina

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