Eastern Purple Coneflower
- Includes basic information, photographs, and user submitted comments from Dave's Garden.
- http://davesgarden.com/guides/pf/go/26/

Production of Purple Coneflower as a Cut Flower
- Includes cultivars, propagation, insects and diseases.
- http://www.agnr.umd.edu/MCE/Publications/Publication.cfm?ID=65

Echinacea purpurea 'Magnus'
- Includes photographs, pros and cons, and suggested companion plants from GardenLady.com.
- http://www.gardenlady.com/echinacea.html

Discover the Versatility of Purple Coneflower
- Cultivation and lore from Flower and Garden Magazine.
- http://www.findarticles.com/p/articles/mi_m1082/is_n4_v42/ai_20912188

Yellows Disease of Purple Coneflower
- Description and control from Horticulture and Home Pest News.
- http://www.ipm.iastate.edu/ipm/hortnews/1998/7-24-1998/yellows.html

Purple Coneflower
- Overview of the characteristics of Echinacea purpurea and several related species as wildflowers, with photos and basic information.
- http://www.gpnc.org/purple.htm