How to Fertilize Magnolias in Zone 4
Magnolias hardy in USDA plant zone 4 include Magnolia x loebneri "Merrill" and Magnolia stellata. Both have scented white flowers in early spring before the leaves appear. Grow magnolias in a place with morning sun and partial afternoon shade. Pick a sheltered location between buildings or among large evergreens where snow collects to cover their vulnerable roots. In zone 4, magnolia flower buds are susceptible to frost damage, and the plants often do not attain their full height because of branch die off every year. Fertilize magnolias every fall. Does this Spark an idea?
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Instructions
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Apply a 4-inch layer of compost around the base of the magnolia every fall. Compost provides magnolias with nutrients. Compost also acts as a mulch, helping to protect the magnolia roots from extreme cold during zone 4's long winters.
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Leave fallen leaves around the magnolia. The leaves rot, providing extra nutrition for the plants as well as an extra layer of mulch to help protect its roots.
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Dig in a handful of bone meal around the magnolia's root zone every fall. Bone meal contains phosphorus that helps magnolias form flower buds.
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