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

One way of figuring out when to plant iresene is to consult the USDA zone info for Columbus.

Planting Calendar for Iresene

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

Since iresene are not cold tolerant it's important to wait until after the last frost has passed before you can plant them.

The earliest that you can plant iresene in Columbus 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 iresene and expect a good harvest is probably August. If you wait any later than that and your iresene may not have a chance to really do well. Starting your iresene indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

In Columbus 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.

Always keep in mind that USDA zone info for Columbus may not be accurate from year to year and the actual date of last frost will vary from year to year. Half of the time in Columbus it frosts late in the year after March 15 so make sure that you are ready to protect your iresene in the event of a surprise late frost.

USDA Zone Info for Columbus

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 Columbus

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