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Rejuvenating an Aging Gardenia: Soil Aeration and Slow-Release Fertilizer Technique

Q: I have a 40-year-old gardenia. Past 2 years it produces small leaves, loses branches, and few flowers. Advice?

Try to rejuvenate in place. Mix 1 pint Milorganite organic fertilizer with 1 cubic foot soil conditioner. Apply in a ¼-inch layer around the plant. Once applied, mix into soil by repeatedly jabbing with a spading fork and wiggling. Milorganite supplies slow-release nutrients; fork holes aerate soil around roots.

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