One of the best tools that you have as gardeners to help us estimate 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 earliest that you can plant clover in Altoona should be determined by looking at the USDA zone info.

Planting Calendar for Clover

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

Clover do ok in very little cold which tells us that you can plant them slightly earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant clover in Altoona is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant clover and expect a good harvest is probably August. Any later than that and your clover may not have a chance to fully mature. If you are starting your clover indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

On average the last frost has passed is on May 15 in Altoona. You can expect an average low temperature of -25°F in the coldest months of winter.

Remember that USDA zone info for Altoona is not always accurate and the actual date of last frost is different every year. Since half of the time in Altoona there is a last frost after May 15 be ready to protect your clover if you have a surprise late frost.

USDA Zone Info for Altoona

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 Altoona

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