One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By reviewing the USDA zone info for Grand Junction you will be able to estimate when it's a good idea to plant scarlet pimpernels.

Planting Calendar for Scarlet Pimpernels

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

Since scarlet pimpernels do ok in moderate cold you can plant them slightly earlier in the year than other frost tender plants.

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

Last Frost Date

On average the last frost has passed is on April 15 in Grand Junction. In the coldest months of winter you should expect an average low temperature of 0°F.

Remember that USDA zone info for Grand Junction is an average and the actual date of last frost changes from year to year. Half of the time in Grand Junction last frost occurs after April 15 so always be ready to cover your scarlet pimpernels if you have a surprise late frost.

USDA Zone Info for Grand Junction

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	0°F
Highest Expected Low	5°F

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in Grand Junction

You may be interested in your other planting guides for Grand Junction.