Gainesville, Virginia. Homefacts City Report. Gainesville is located in Prince William County, VA. The population is 11,225. There are 5 public schools in Gainesville with an average Homefacts rating of A. The total crime rate for Gainesville is very low, and there are 21 registered sex offenders residing in the city.
On average, northern cardinals live for 3 years in the wild although several individuals have had life spans of 13 to 15 years. The longevity record for a captive northern cardinal is 28 Â½ years!
The plant forms two foot clumps which produce many 2-3 foot, long lasting flower spikes in late summer. Cardinal Flowers are easy to grow and care for, but unfortunately are rather short lived and will need to be replaced every 3-4 years. They are hardy in USDA zones 3-9. In most areas, Lobelia should be planted in full sun but in hot climates they will require partial shade.