One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. 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 gloriosa lily in Coralville should be figured out by reviewing the USDA zone info.

Planting Calendar for Gloriosa Lily

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

Since gloriosa lily do not do well in cold weather it's important to wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant gloriosa lily in Coralville 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 gloriosa lily and expect a good harvest is probably August. You probably don't want to wait any later than that or else your gloriosa lily may not have a chance to fully mature. If you are starting your gloriosa lily indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

In Coralville the average date of last frost happens on April 15. You should expect an average low temperature of -15°F in the coldest months of winter.

Since the USDA zone info for Coralville is not always accurate the actual date of last frost changes from year to year. Half of the time in Coralville last frost occurs after April 15 so make sure that you are ready to cover your gloriosa lily in the event of a surprise late frost.

USDA Zone Info for Coralville

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 Coralville

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