One of the first steps you take when you are determining your gardening schedule is find your 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.

A way of getting a good idea when you can plant balloon flower is to refer to the USDA zone info for Prosper.

Planting Calendar for Balloon Flower

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

Balloon Flower are barely cold tolerant which means that you can get them planted just a bit earlier than other frost tender plants.

The earliest that you can plant balloon flower in Prosper is March. However, you really should wait until April if you don't want to take any chances.

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

Last Frost Date

On average the last frost has passed is on March 15 in Prosper. You should expect an average low temperature of 10°F in the coldest months of winter.

Since the USDA zone info for Prosper is just an average the actual date of last frost is different every year. Since half of the time in Prosper you get surprised by a frost after March 15 be ready to cover your balloon flower if you have a surprise late frost.

USDA Zone Info for Prosper

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°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 15°F.

Plants to Grow in Prosper

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