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

It's a good idea to estimate when to plant chives by referring to the USDA zone info for Waterloo.

Planting Calendar for Chives

Frost tolerance for chives:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Chives do ok in cold weather which tells us that you can plant them quite a bit earlier in the year than other plants that might not handle the cold.

The earliest that you can plant chives in Waterloo is February. However, you really should wait until March if you don't want to take any chances.

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

Last Frost Date

The average date of last frost is April 15 in Waterloo. In the coldest months of winter you should expect an average low temperature of -10°F.

Since the USDA zone info for Waterloo is just an average the actual date of last frost changes from year to year. Since half of the time in Waterloo last frost occurs after April 15 be ready to cover your chives if you have a late frost.

USDA Zone Info for Waterloo

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Waterloo

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