The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Cottage Grove you can estimate when you can plant hosta by reviewing the USDA zone info.

Planting Calendar for Hosta

Frost tolerance for hosta:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Hosta are one of those plants that can tolerate a little bit of cold weather which tells us that you can plant them a little bit earlier than more sensitive plants.

The earliest that you can plant hosta in Cottage Grove 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 hosta and expect a good harvest is probably August. If you wait any later than that and your hosta may not have a chance to fully mature. You can get started a few weeks earlier by starting your hosta indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on May 15 in Cottage Grove. In the coldest months of winter you should expect an average low temperature of -25°F.

Since the USDA zone info for Cottage Grove is just an average the actual date of last frost is different every year. Half of the time in Cottage Grove last frost occurs after May 15 so make sure that you are prepared to protect your hosta in the event of a late frost.

USDA Zone Info for Cottage Grove

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°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 -20°F.

Plants to Grow in Cottage Grove

You may be interested in your other planting guides for Cottage Grove.