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 Grass Valley you can estimate when it's a good idea to plant pumpkins by checking out the USDA zone info.

Planting Calendar for Pumpkins

Frost tolerance for pumpkins:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

It's probably not a good idea to plant pumpkins until after the last frost because they are not cold tolerant.

The earliest that you can plant pumpkins in Grass Valley 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 pumpkins and expect a good harvest is probably September. If you wait any later than that and your pumpkins may not have a chance to fully mature. If you are starting your pumpkins 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 February 15 in Grass Valley. In the coldest months of winter you should expect an average low temperature of 20°F.

Since the USDA zone info for Grass Valley may not be accurate from year to year the actual date of last frost is different every year. Since half of the time in Grass Valley there is a last frost after February 15 be ready to protect your pumpkins if you have a late frost.

USDA Zone Info for Grass Valley

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

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

Plants to Grow in Grass Valley

You may be interested in your other planting guides for Grass Valley.