One of the first steps you take when you are determining 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.

The first opportunity to plant alternaria in Grants Pass can be estimated by using the USDA zone info.

Planting Calendar for Alternaria

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

It's probably a bad idea to plant alternaria until after the last frost because they require warm weather.

The earliest that you can plant alternaria in Grants Pass 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. You probably don't want to wait any later than that or else your alternaria may not have a chance to grow to maturity. Starting your alternaria indoors is a great way to get them started a few weeks earlier.

Last Frost Date

In Grants Pass the average date of last frost happens on March 15. You should expect an average low temperature of 15°F in the coldest months of winter.

Remember that the actual date of last frost is just an average because it is based on the USDA zone info for Grants Pass and it will vary from year to year. Since half of the time in Grants Pass there is a last frost after March 15 be ready to protect your alternaria in the event of a surprise late frost.

USDA Zone Info for Grants Pass

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	October 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 Grants Pass

You may be interested in your other planting guides for Grants Pass.