One of the first steps you take when you are getting a good idea your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Newport Beach you can estimate when it's a good idea to plant alternanthera by referring to 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.

Since alternanthera are not cold tolerant it is important to wait until after the last frost has passed before you can plant them.

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

Last Frost Date

On average all chance of frost has passed is on January 31 in Newport Beach. In the coldest months of winter you can expect an average low temperature of 35°F.

Keep in mind that the actual date of last frost is an average because it is based on the USDA zone info for Newport Beach and it will vary from year to year. Since half of the time in Newport Beach you get surprised by a frost after January 31 be ready to cover your alternanthera if you have a surprise late frost.

USDA Zone Info for Newport Beach

Here is the info for USDA Zone 10b.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	35°F
Highest Expected Low	40°F

This means that on a really cold year, the coldest it will get is 35°F. On most years you should be prepared to experience lows near 40°F.

Plants to Grow in Newport Beach

You may be interested in your other planting guides for Newport Beach.