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.

A common way of figuring out when to plant hosta is to look at the USDA zone info for Riverbank.

Planting Calendar for Hosta

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

Hosta do ok in some cold which tells us that you can plant them a bit earlier in the year than more sensitive plants.

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

The last month that you can plant hosta and expect a good harvest is probably October. You probably don't want to wait any later than that or else your hosta may not have a chance to grow to maturity. Starting your hosta indoors is a great way to get them started a few weeks earlier.

Last Frost Date

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

Remember that USDA zone info for Riverbank 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 Riverbank there is a last frost after February 15 be ready to protect your hosta in the event of a surprise late frost.

USDA Zone Info for Riverbank

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 Riverbank

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