My Evergreen Shrubs Are Dying
Growing evergreens requires very little work, but if your shrubs begin dying, it means something is wrong. Common signs of dying evergreen shrubs include dropping needles and needles that are turning brown. In many cases, dying evergreens can be saved with a simple fix in the way you care for them.
Examine where your tree is planted. Evergreens planted in extremely wet conditions can suffer from root rot.
Check your tree carefully for diseases and insect infestation. Ask a trained horticulturist from a local garden centre to help you determine if your tree is diseased or not. Take a branch to your garden centre that is showing symptoms for an evaluation. Follow the horticulturist's recommendation to heal the tree if there is a disease.
Check the pH levels in the soil. Evergreens prefer to grow in acidic soils, so add aluminium sulphate to the soil if levels are too low.
Add evergreen-specific fertiliser to the tree. Do not apply the fertiliser in the summer since it may burn the tree. Be careful when applying fertiliser, and follow instructions on the packaging.