Dolomitic Lime Particle Size and Container Medium pH

Abstract Boxwood liners, Buxus sempervirens ‘Suffruticosa’, were container-grown for two years in a pine bark/peat moss medium amended with various particle sizes of dolomitic limestone. Adjustment of pH was more effectively accomplished with the finer particles. All treatments resulted in greater plant growth than the untreated control. A surface application of a commercially available pulverized dolomitic limestone was also effective in increasing the pH above the control treatment, and plants grown with the surface applied treatment were as large as any of the incorporated treatments.