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.

You should be able to determine when you can plant alternanthera by reviewing the USDA zone info for Scotts Valley.

Planting Calendar for Alternanthera

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

You really shouldn't plant alternanthera until after the last frost because they are not cold tolerant.

The earliest that you can plant alternanthera in Scotts Valley is March. However, you really should wait until April 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. Starting your alternanthera indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average all chance of frost has passed is on February 15 in Scotts Valley. You can expect an average low temperature of 25°F in the coldest months of winter.

Keep in mind that USDA zone info for Scotts Valley is an average and the actual date of last frost is different every year. Half of the time in Scotts Valley it frosts late in the year after February 15 so make sure that you are prepared to cover your alternanthera in the event of a surprise late frost.

USDA Zone Info for Scotts Valley

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Scotts Valley

You may be interested in your other planting guides for Scotts Valley.