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Tips and Tricks for Outdoor Mum and Hydrangea Production this Summer

Do you grow hardy mums and hydrangeas outdoors? If so, this blog post is for you! Flowers Canada Ontario, the Soil Resource Group and OMAFRA have collected data about fertilizer and water management in outdoor greenhouse crops over the last few summers, and have some updated production information for growers to think about over this year’s season.

The goal of the study was to look at ways to improve fertilizer and irrigation efficiency outside of the greenhouse. We looked at several mum and hydrangea fields throughout Ontario, and measured the amount of irrigation each crop received. This included irrigation from rainwater and either drip line or overhead sprinklers. The amount of water that passed through each pot after an irrigation event (leachate) was also collected and measured. Some crops were fed with water soluble fertilizer (both overhead and through drip irrigation lines), while others used incorporated controlled release fertilizers and were irrigated with just plain water.

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