When to Plant Bougainvillea in Olney, IL

One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The first opportunity to plant bougainvillea in Olney can be determined by reviewing the USDA zone info.

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Planting Calendar for Bougainvillea

Frost tolerance for bougainvillea: Not tolerant of frost.
When to plant: After the last frost when the weather gets warmer.

It's a bad idea to plant bougainvillea until after all chance of frost has passed because they do not do well in cold weather.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant bougainvillea
Possibly ok, but a risky time to plant bougainvillea
Probably not a good time to plant bougainvillea

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

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Olney. It might get as low as -10°F during the coldest months of winter.

Keep in mind that USDA zone info for Olney is not always accurate and the actual date of last frost can change quite a bit from year to year. Half of the time in Olney it frosts late in the year after April 15 so just be sure to be ready to cover your bougainvillea if you have a surprise late frost.

USDA Zone Info for Olney

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)April 15
Average Date of First Frost (fall)October 15
Lowest Expected Low-10°F
Highest Expected Low-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Olney

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