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.

One way of figuring out when to plant alternanthera is to refer to the USDA zone info for Poulsbo.

Planting Calendar for Alternanthera

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

Since alternanthera require warm weather it is important to wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant alternanthera in Poulsbo 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. If you wait any later than that and 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 the last frost is on March 15 in Poulsbo. You should expect an average low temperature of 15°F in the coldest months of winter.

Since the USDA zone info for Poulsbo may not be accurate from year to year the actual date of last frost will vary from year to year. Half of the time in Poulsbo it frosts late in the year after March 15 so just be sure to be ready to cover your alternanthera if you have a late frost.

USDA Zone Info for Poulsbo

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°F

This means that on a really cold year, the coldest it will get is 15°F. On most years you should be prepared to experience lows near 20°F.

Plants to Grow in Poulsbo

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