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.

The USDA zone info for Holtville can be reffered to in order to determine when it's a good idea to plant melampodium.

Planting Calendar for Melampodium

Frost tolerance for melampodium:	Not tolerant of frost.
When to plant:	After the last frost has passed.

Since melampodium require warm weather you have to wait until after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant melampodium in Holtville 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. Any later than that and your melampodium may not have a chance to really do well. You can get started a couple of weeks earlier by starting your melampodium indoors.

Last Frost Date

The average date of last frost is January 31 in Holtville. It might get as low as 30°F during the coldest months of winter.

Since the USDA zone info for Holtville is just an average the actual date of last frost changes from year to year. Half of the time in Holtville you get a frost after January 31 so make sure that you are prepared to cover your melampodium in the event of a surprise late frost.

USDA Zone Info for Holtville

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 Holtville

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