The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The best time to plant argyranthemum in Oelwein should be figured out by looking at the USDA zone info.

Planting Calendar for Argyranthemum

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

Argyranthemum require warm weather which means that it's important to wait until it warms up after the last frost when the weather gets warmer before you can plant them.

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

Last Frost Date

On average all chance of frost has passed is on April 15 in Oelwein. You should expect an average low temperature of -20°F in the coldest months of winter.

Since the USDA zone info for Oelwein is just an average the actual date of last frost can change quite a bit from year to year. Half of the time in Oelwein last frost occurs after April 15 so always be ready to cover your argyranthemum if you have one of those late frosts.

USDA Zone Info for Oelwein

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°F

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

Plants to Grow in Oelwein

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