Suståne® 8-4-4 Fertility Trial, Vinca
(Catharanthus roseus ‘Pacifica XP Blush’)

PAT2H Horticultural Consulting Services, Rydal, Georgia, 20098 4 4 vinca trial


More than 25% of growers surveyed in 2007 reported managing fertility as the biggest challenge in organic production of ornamental crops, second only to pest management (Burnett and Stack, 2009)1. Therefore, Suståne® 8-4-4, an all natural fertilizer made from aerobically composted turkey litter was evaluated for use on ‘Pacifica XP Blush’ vinca. The trial compared Suståne 8-4-4 (45 day) to two industry-leading control release fertilizers, a 13-13-13(T70) and a 14-14-14(3-4 mo.). Each fertilizer was incorporated at a rate of 0.85 pounds of nitrogen per cubic yard. The potting medium was a 50:40:10 mix (by volume) of pine bark, peat and perlite.


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