One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You will be able to determine when to plant alternanthera by checking out the USDA zone info for Duarte.

Planting Calendar for Alternanthera

Frost tolerance for alternanthera:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Alternanthera require warm weather which means that you need to wait until it warms up after the last frost before you can plant them.

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

Last Frost Date

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

Since the USDA zone info for Duarte is an average the actual date of last frost can change quite a bit from year to year. Since half of the time in Duarte you get a frost after January 31 be ready to cover your alternanthera in the event of one of those late frosts.

USDA Zone Info for Duarte

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 Duarte

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