WSU Extension

Hortsense

Juniper
 
Disease
Dieback 
Magnesium deficiency 
Pear trellis rust 
Phomopsis twig blight 
Phytophthora root rot 
Rust 
Insect
Aphids 
Cypress tip moth 
Juniper scale 
Juniper tip midge 
Juniper webworm 
Leafminers 
Spruce spider mite 



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Juniper : Magnesium deficiency
(revision date: 4/23/2014)


Biology
Magnesium (Mg) deficiency is a result of improper nutrition. A juniper lacking sufficient magnesium develops yellowing or dead foliage in the center and grows slowly. Older tissues are affected first. Magnesium deficiency may resemble damage caused by Phomopsis twig blight.
Management Options


Non-Chemical Management
  • Apply Epsom salts (magnesium sulfate) either to the soil (1 cup per 100 square feet) or as a foliar fertilizer (5 ounces per gallon of water).
  • Switch to a fertilizer containing magnesium.
  • Addition of dolomite lime to the soil may help, but is not an immediate solution.
Select non-chemical management options as your first choice!

Chemical Management

None recommended

Images

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