One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Salt Lake City you can determine when you can plant datura by using the USDA zone info.

Planting Calendar for Datura

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

Since datura do ok in moderate cold you can plant them a bit earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant datura in Salt Lake City 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 datura and expect a good harvest is probably August. Any later than that and your datura may not have a chance to really do well. Starting your datura indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Salt Lake City. You can expect an average low temperature of 5°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Salt Lake City may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Half of the time in Salt Lake City it frosts late in the year after April 15 so make sure that you are prepared to cover your datura in the event of one of those late frosts.

USDA Zone Info for Salt Lake City

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 Salt Lake City

You may be interested in your other planting guides for Salt Lake City.