Horn Canna Farm in Carnegie is one of the world's largest exclusive canna growers and America's only exclusive canna farm featuring over 30 varieties. Sitting on approximately 60 acres, Horn Canna is a fourth generation farm welcoming visitors year-round, with September being the peak month to view the field of blooms. Cannas begin blooming in July and bloom until the annual harvest begins in early October. Horn Canna Farm can be viewed during daylight hours, with best viewing during the morning. The best way to enjoy this unique Oklahoma farm is to park anywhere along the perimeter and walk into the field. Visitors are welcome to wander into the field, take pictures and stay as long as they like.