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

You can determine when to plant chinese chives in Zone 4b by checking out the USDA zone info.

Planting Calendar for Chinese chives

Frost tolerance for chinese chives:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Since chinese chives are moderately cold tolerant you can plant them just a bit earlier in the year than more sensitive plants.

The earliest that you can plant chinese chives in Zone 4b is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant chinese chives and expect a good harvest is probably August. If you wait any later than that and your chinese chives may not have a chance to really do well. If you are starting your chinese chives indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

On average the last frost is on May 15 in Zone 4b. It might get as low as -25°F during the coldest months of winter.

Just be sure to remember that the actual date of last frost is not always accurate because it is based on the USDA zone info for Zone 4b and it will vary from year to year. Since half of the time in Zone 4b you get a frost after May 15 be ready to cover your chinese chives in the event of a surprise late frost.

USDA Zone Info for Zone 4b

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Zone 4b

You may be interested in your other planting guides for Zone 4b.