The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You will be able to estimate when it's possible to plant datura by looking at the USDA zone info for Marysville.

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.

You can plant datura slightly earlier in the year because they are barely cold tolerant.

The earliest that you can plant datura in Marysville 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 datura and expect a good harvest is probably September. Any later than that and your datura may not have a chance to really do well. You can get started a few weeks earlier by starting your datura indoors.

Last Frost Date

The average date of last frost is February 15 in Marysville. You can expect an average low temperature of 25°F in the coldest months of winter.

Since the USDA zone info for Marysville is just an average the actual date of last frost changes from year to year. Since half of the time in Marysville you get a frost after February 15 be ready to cover your datura if you have a late frost.

USDA Zone Info for Marysville

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Marysville

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