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.

It's possible to figure out when it's possible to plant scallions by looking at the USDA zone info for Berwyn.

Planting Calendar for Scallions

Frost tolerance for scallions:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Since scallions do ok in moderate cold you can plant them a bit earlier in the year than other frost tender plants.

The earliest that you can plant scallions in Berwyn 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 scallions and expect a good harvest is probably August. Any later than that and your scallions may not have a chance to really do well. You can get started a couple of weeks earlier by starting your scallions indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Berwyn. It might get as low as -10°F during the coldest months of winter.

Since the USDA zone info for Berwyn is not always accurate the actual date of last frost can change quite a bit from year to year. Half of the time in Berwyn there is a last frost after April 15 so be sure to be ready to cover your scallions in the event of a surprise late frost.

USDA Zone Info for Berwyn

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 Berwyn

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