The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The earliest that you can plant angel's trumpets in Oskaloosa can be estimated by referring to the USDA zone info.

Planting Calendar for Angel's Trumpets

Frost tolerance for angel's trumpets:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Angel's Trumpets are one of those plants that can tolerate a tiny bit of cold weather which means that you can start planting them slightly earlier than more sensitive plants.

The earliest that you can plant angel's trumpets in Oskaloosa 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 angel's trumpets and expect a good harvest is probably August. Any later than that and your angel's trumpets may not have a chance to fully mature. Starting your angel's trumpets indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Oskaloosa. In the coldest months of winter you should expect an average low temperature of -15°F.

Keep in mind that USDA zone info for Oskaloosa may not be accurate from year to year and the actual date of last frost is different every year. Half of the time in Oskaloosa last frost occurs after April 15 so be sure to be ready to protect your angel's trumpets in the event of one of those late frosts.

USDA Zone Info for Oskaloosa

Here is the info for USDA Zone 5b.

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

Plants to Grow in Oskaloosa

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