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

The best time to plant melampodium in Diamond Bar can be figured out by looking at the USDA zone info.

Planting Calendar for Melampodium

Frost tolerance for melampodium:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

It's probably not a good idea to plant melampodium until after all chance of frost has passed because they are not cold tolerant.

The earliest that you can plant melampodium 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 melampodium and expect a good harvest is probably September. You probably don't want to wait any later than that or else your melampodium may not have a chance to grow to maturity. You can get started a little bit earlier by starting your melampodium indoors.

Last Frost Date

The average date of last frost is January 31 in Diamond Bar. In the coldest months of winter you should expect an average low temperature of 30°F.

Since the USDA zone info for Diamond Bar is not always accurate the actual date of last frost will vary from year to year. Since half of the time in Diamond Bar there is a last frost after January 31 be ready to protect your melampodium in the event of a late frost.

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.