One of the best tools that you have as gardeners to help us figure out 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.

The best time to plant lobelia in Prescott should be figured out by referring to the USDA zone info.

Planting Calendar for Lobelia

Frost tolerance for lobelia:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Lobelia do well in cold which means that you can get them planted much earlier than other plants that might not handle the cold.

The earliest that you can plant lobelia in Prescott is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant lobelia and expect a good harvest is probably September. Any later than that and your lobelia may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your lobelia indoors.

Last Frost Date

In Prescott the average date of last frost happens on April 15. You can expect an average low temperature of 5°F in the coldest months of winter.

Remember that USDA zone info for Prescott is just an average and the actual date of last frost can change quite a bit from year to year. Since half of the time in Prescott it frosts late in the year after April 15 be ready to protect your lobelia in the event of a surprise late frost.

USDA Zone Info for Prescott

Here is the info for USDA Zone 7b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	5°F
Highest Expected Low	10°F

This means that on a really cold year, the coldest it will get is 5°F. On most years you should be prepared to experience lows near 10°F.

Plants to Grow in Prescott

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