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

The earliest that you can plant alternanthera in Pleasant Hill should be estimated by using the USDA zone info.

Planting Calendar for Alternanthera

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

It's not a good idea to plant alternanthera until after all chance of frost has passed because they do not do well in cold weather.

The earliest that you can plant alternanthera in Pleasant Hill is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant alternanthera and expect a good harvest is probably August. Any later than that and your alternanthera may not have a chance to fully mature. You can get started a little bit earlier by starting your alternanthera indoors.

Last Frost Date

The average date of last frost is April 15 in Pleasant Hill. In the coldest months of winter you should expect an average low temperature of -10°F.

Since the USDA zone info for Pleasant Hill is an average the actual date of last frost can change quite a bit from year to year. Half of the time in Pleasant Hill you get surprised by a frost after April 15 so be sure to be ready to protect your alternanthera if you have a late frost.

USDA Zone Info for Pleasant Hill

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Pleasant Hill

You may be interested in your other planting guides for Pleasant Hill.