Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. 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 Columbus should be reffered to in order to figure out when it's the best time to plant brachycome.

Planting Calendar for Brachycome

Frost tolerance for brachycome:	Not tolerant of frost.
When to plant:	After the last frost.

It's probably not a good idea to plant brachycome until after the last frost because they do not do well in cold weather.

The earliest that you can plant brachycome 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 brachycome and expect a good harvest is probably August. You probably don't want to wait any later than that or else your brachycome may not have a chance to really do well. Starting your brachycome indoors is a great way to get them started a little bit earlier.

Last Frost Date

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

Since the USDA zone info for Columbus is not always accurate the actual date of last frost can change quite a bit from year to year. Since half of the time in Columbus you get surprised by a frost after April 15 be ready to cover your brachycome if you have 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.