CalPhotos: Rhododendron calendulaceum; Flame Azalea How to grow basil: the best way to basil Even Harley Davidson Can't Resist the Tug of Overseas Factories The New York Times Flame Azalea (Rhododendron calendulaceum) in Boston Hopkinton Chelmsford Hingham Middleborough Massachusetts MA at Weston Nurseries Genetically modified (GM) crops may have some harmful effects if not managed properly. . There are also concerns about possible health effects and environmental impact, such as gene transfer to non GM plants.