One of the first steps you take when you are making a decision about your gardening schedule is find your 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.

A way of estimating when to plant alternaria is to examine the USDA zone info for Mountlake Terrace.

Planting Calendar for Alternaria

Frost tolerance for alternaria:	Not tolerant of frost.
When to plant:	After the last frost has passed.

Since alternaria require warm weather you need to wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant alternaria in Mountlake Terrace 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 alternaria and expect a good harvest is probably August. If you wait any later than that and your alternaria may not have a chance to really do well. You can get started a couple of weeks earlier by starting your alternaria indoors.

Last Frost Date

On average all chance of frost has passed is on March 15 in Mountlake Terrace. It might get as low as 15°F during the coldest months of winter.

Keep in mind that the actual date of last frost is just an average because it is based on the USDA zone info for Mountlake Terrace and it will vary from year to year. Half of the time in Mountlake Terrace it frosts late in the year after March 15 so always be ready to protect your alternaria if you have a surprise late frost.

USDA Zone Info for Mountlake Terrace

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 Mountlake Terrace

You may be interested in your other planting guides for Mountlake Terrace.