Optimizing nutrient delivery in greenhouse-grown potted chrysanthemums: Sub-irrigation and drip irrigation systems

Dr. Barry Shelp
University of Guelph

This research work will further test the hypothesis that nutrient use efficiency of modern cultivars of greenhouse-grown potted chrysanthemums can be improved by reducing nutrient supply during vegetative growth, in combination with an interrupted supply during reproductive growth, without sacrificing plant yield and quality. The current project objective is to optimize the delivery of the remaining macronutrients (calcium and magnesium), as well as the micronutrients, to sub-irrigated and drip-irrigated potted chrysanthemums.

Research in years one to four will study the delivery of specific macronutrient combinations during vegetative growth of sub-irrigated potted chrysanthemums over two growing seasons. The year five objective will be to determine whether the optimized nutrient delivery system established for sub-irrigated potted chrysanthemums in the research greenhouse is applicable to both sub-irrigated and drip-irrigated chrysanthemums.

Shelp (Eng) Mar 2019

Shelp (Eng) Feb 2020

Shelp (Eng) Mar 2021 or watch on YouTube