The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. 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 lavender cotton in Sioux City should be determined by using the USDA zone info.

Planting Calendar for Lavender Cotton

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

Since lavender cotton are very cold tolerant you can plant them much earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant lavender cotton in Sioux City 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 lavender cotton and expect a good harvest is probably September. Any later than that and your lavender cotton may not have a chance to grow to maturity. Starting your lavender cotton indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost is on April 15 in Sioux City. In the coldest months of winter you can expect an average low temperature of -20°F.

It's important to remember that USDA zone info for Sioux City is not always accurate and the actual date of last frost changes from year to year. Since half of the time in Sioux City you get a frost after April 15 be ready to protect your lavender cotton in the event of a surprise late frost.

USDA Zone Info for Sioux City

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°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 -15°F.

Plants to Grow in Sioux City

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