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.

A common way of estimating when you can plant mecardonia is to examine the USDA zone info for Holtville.

Planting Calendar for Mecardonia

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

Mecardonia are not cold tolerant which means that you must wait until it warms up after the last frost before you can plant them.

The earliest that you can plant mecardonia 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 mecardonia and expect a good harvest is probably September. You probably don't want to wait any later than that or else your mecardonia may not have a chance to fully mature. Starting your mecardonia indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on January 31 in Holtville. In the coldest months of winter you can expect an average low temperature of 30°F.

Since the USDA zone info for Holtville may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Half of the time in Holtville it frosts late in the year after January 31 so make sure that you are prepared to protect your mecardonia if you have one of those late frosts.

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.