One of the first steps you take when you are estimating 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 Delphos you can estimate when it's the best time to plant napa valley fern by referring to the USDA zone info.

Planting Calendar for Napa Valley Fern

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

It's probably a bad idea to plant napa valley fern until after the last frost has passed because they are not cold tolerant.

The earliest that you can plant napa valley fern in Delphos 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 napa valley fern and expect a good harvest is probably August. You probably don't want to wait any later than that or else your napa valley fern may not have a chance to fully mature. Starting your napa valley fern indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Delphos. It might get as low as -10°F during the coldest months of winter.

It's important to remember that the actual date of last frost is not always accurate because it is based on the USDA zone info for Delphos and it is different every year. Half of the time in Delphos you get a frost after April 15 so make sure that you are prepared to protect your napa valley fern in the event of a late frost.

USDA Zone Info for Delphos

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Delphos

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