Monrovia is one of the world's largest producers of container grown plants, with more than 2,300 different varieties.  Since it was founded in 1926 by Harry E. Rosedale, the company has introduced hundreds of patented plants, more than 220 of which are Monrovia exclusives.   Monrovia plants are shipped to independent garden centers nationwide from its nurseries in Visalia and Venice Hills, Calif., Dayton, Ore., LaGrange, N.C. and Cairo, Ga.  Throughout its history, Monrovia has pioneered many new technologies and new plant introductions.  It remains a family owned entity.  To find the nearest garden center that carries Monrovia plants, visit monrovia.com.