One of the first steps you take when you are estimating 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.

In Diamond Bar you can figure out when it's the best time to plant echinacea by looking at the USDA zone info.

Planting Calendar for Echinacea

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

Echinacea are one of those plants that can tolerate a tiny bit of cold weather which means that you can plant them slightly earlier than other plants that might not handle the cold.

The earliest that you can plant echinacea in Diamond Bar 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 echinacea and expect a good harvest is probably September. If you wait any later than that and your echinacea may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your echinacea indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on January 31 in Diamond Bar. It might get as low as 30°F during the coldest months of winter.

Always keep in mind that USDA zone info for Diamond Bar is not always accurate and the actual date of last frost changes from year to year. Half of the time in Diamond Bar there is a last frost after January 31 so always be ready to protect your echinacea in the event of one of those late frosts.

USDA Zone Info for Diamond Bar

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 Diamond Bar

You may be interested in your other planting guides for Diamond Bar.