One of the first steps you take when you are getting a good idea your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

One way of figuring out when it's the best time to plant sweet corn is to use the USDA zone info for Puyallup.

Planting Calendar for Sweet corn

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

Sweet corn are one of those plants that can tolerate a tiny bit of cold weather which tells us that you can plant them slightly earlier than more sensitive plants.

The earliest that you can plant sweet corn in Puyallup 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 sweet corn and expect a good harvest is probably August. Any later than that and your sweet corn may not have a chance to fully mature. You can get started a little bit earlier by starting your sweet corn indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on March 15 in Puyallup. In the coldest months of winter you should expect an average low temperature of 15°F.

Since the USDA zone info for Puyallup may not be accurate from year to year the actual date of last frost changes from year to year. Half of the time in Puyallup you get surprised by a frost after March 15 so make sure that you are ready to cover your sweet corn if you have a surprise late frost.

USDA Zone Info for Puyallup

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°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 20°F.

Plants to Grow in Puyallup

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