Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Coralville you can determine when it's possible to plant tropical water plants by referring to the USDA zone info.

Planting Calendar for Tropical Water Plants

Frost tolerance for tropical water plants:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Since tropical water plants do not do well in cold weather it's necessary to wait until after the last frost before you can plant them.

The earliest that you can plant tropical water plants 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 tropical water plants and expect a good harvest is probably August. Any later than that and your tropical water plants may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your tropical water plants indoors.

Last Frost Date

On average the last frost is on April 15 in Coralville. It might get as low as -15°F during the coldest months of winter.

Since the USDA zone info for Coralville is just an average the actual date of last frost changes from year to year. Since half of the time in Coralville last frost occurs after April 15 be ready to protect your tropical water plants if you have a 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.