Spring fertilization encourages new growth and overall health. Fertilization can also help plants recover from winter damage.
As the weather warms, diseases and insects also emerge and begin infecting trees and shrubs. Apple scab is a foliar disease on apple and crab apple trees. Apple scab produces rust colored spots on leaves. See photo above. Three applications, beginning at bud break can minimize apple scab infection.
Needle cast is a disease of evergreen trees, especially spruce trees. Needle cast causes needles to yellow and eventually drop. Evergreen trees cannot replace these needles, which leads to thin looking trees and eventually death. Three applications applied during the spring can prevent needle cast infections.
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