The USDA Zone info is a great tool for gardeners to help us figure out 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.

The first chance to plant nemesia in Columbus can be figured out by using the USDA zone info.

Planting Calendar for Nemesia

Frost tolerance for nemesia:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Since nemesia require warm weather it's necessary to wait until after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant nemesia in Columbus 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 nemesia and expect a good harvest is probably August. Any later than that and your nemesia may not have a chance to grow to maturity. You can get started a little bit earlier by starting your nemesia indoors.

Last Frost Date

The average date of last frost is April 15 in Columbus. You should expect an average low temperature of -15°F in the coldest months of winter.

Since the USDA zone info for Columbus is an average the actual date of last frost can change quite a bit from year to year. Since half of the time in Columbus there is a last frost after April 15 be ready to cover your nemesia in the event of a surprise late frost.

USDA Zone Info for Columbus

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 Columbus

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