Dr. John Olive and Dr. Charles Gilliam, Auburn University, Ornamental Horticultural Research Center, Mobile, Alabama, 2008
Suståne 16-4-8 was evaluated for use on "Daphne" azalea. The trial compared Suståne 16-4-8 (180 day) to an industry standard 17-7-12 (12 mo) control release fertilizer. Each fertilizer was incorporated at a rate of 2.0 lbs of nitrogen per cubic yard. The potting medium was a 3:1 mix (by volume) of pine bark and peat.