The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

It's a good idea to estimate when it's a good idea to plant violets by looking at the USDA zone info for Spring Grove.

Planting Calendar for Violets

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

Since violets do well in moderate cold you can plant them a little earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant violets in Spring Grove 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 violets and expect a good harvest is probably September. If you wait any later than that and your violets may not have a chance to really do well. You can get started a couple of weeks earlier by starting your violets indoors.

Last Frost Date

The average date of last frost is April 15 in Spring Grove. It might get as low as -15°F during the coldest months of winter.

Keep in mind that USDA zone info for Spring Grove is just an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Spring Grove it frosts late in the year after April 15 so make sure that you are ready to cover your violets if you have a late frost.

USDA Zone Info for Spring Grove

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 Spring Grove

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