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.

The USDA zone info for Lewiston should be used to estimate when you can plant stocks.

Planting Calendar for Stocks

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

Stocks are barely cold tolerant which tells us that you can plant them slightly earlier than more sensitive plants.

The earliest that you can plant stocks in Lewiston 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 stocks and expect a good harvest is probably August. Any later than that and your stocks may not have a chance to really do well. You can get started a couple of weeks earlier by starting your stocks indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Lewiston. It might get as low as -15°F during the coldest months of winter.

Remember that USDA zone info for Lewiston may not be accurate from year to year and the actual date of last frost changes from year to year. Half of the time in Lewiston last frost occurs after April 15 so make sure that you are prepared to protect your stocks if you have a surprise late frost.

USDA Zone Info for Lewiston

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-15°F
Highest Expected Low	-10°F

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Lewiston

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