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  • Author or Editor: James D. Ward x
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Slow-release nutrient sources produced larger, higher quality Ilex crenata Thunb. ‘Hetzi’ plants than liquid fertilization at the same rates. Salable quality plants were produced in one growing season by using Osmocote in the propagation medium and incorporating isobutylidene diurea (IBDU) and fritted potassium (K-frit) or Osmocote plus dolomite, single-superphosphate, and micronutrients into the container-growing medium prior to transplanting liners. A wide range of IBDU,K-frit gave satisfactory results. Nutrition during propagation was essential for best growth and utilization of subsequent container nutrition. Cuttings from plants grown with IBDU, K-frit rooted better than those grown with Osmocote or liquid fertilizer.

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