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 Thomson you can estimate when it's a good idea to plant scallions by looking at the USDA zone info.

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.

Scallions do well in mild cold which tells us that you can plant them just a tiny bit earlier in the year than more sensitive plants.

The earliest that you can plant scallions in Thomson 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

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

Remember that USDA zone info for Thomson may not be accurate from year to year and the actual date of last frost will vary from year to year. Half of the time in Thomson last frost occurs after March 15 so be sure to be ready to protect your scallions if you have one of those late frosts.

USDA Zone Info for Thomson

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°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 15°F.

Plants to Grow in Thomson

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