Wicked Growth Apple Tree Fertilizer

Fruit Quality Without the Excess. No-Phosphorus, High-Potassium 6-0-16

Old Cobblers Farm Wicked Growth 6-0-16 is an apple tree fertilizer built around a fact most orchard soils share: established fruit trees rarely need more phosphorus. Years of feeding leave phosphorus banked in the soil, while nitrogen and especially potassium are drawn down every season by the crop itself. The 6-0-16 analysis answers that — 6% nitrogen for steady foliage and shoot growth without excess vigor, zero phosphorus by design, and 16% potassium, the nutrient apples draw on hardest as fruit sizes, colors, and finishes.

Potassium is the fruit-quality nutrient in apples: heavily cropping trees remove large amounts of it every harvest, and replacing it is what supports fruit size, firmness, and finish year after year. By skipping phosphorus, this formula feeds what the tree actually uses instead of adding to a surplus — which is also better practice for the soil and nearby waterways. It is intended for established trees where a soil test shows adequate phosphorus; young or newly planted trees, and soils testing low in P, need a phosphorus-containing feed instead.

Key Benefits

Potassium for the crop you pick — 16% potassium replaces what every harvest removes — the nutrient apples draw on hardest as fruit sizes, firms, and finishes.

No phosphorus, on purpose — Established orchard soils typically carry years of banked phosphorus; this formula skips adding to the surplus and feeds what the tree actually uses.

Measured nitrogen — 6% nitrogen supports foliage and shoot growth without the excess vigor that costs fruit and invites watersprouts.

Simple drip-line feeding — 2–3 lbs per 100 sq ft spread at the drip line — one 5 lb bag handles one or two medium trees.

The backyard orchard, covered — Also suits established pear, peach, and plum trees where soil phosphorus is adequate.

Honest about its job — The instructions say when NOT to use it — young trees and low-P soils need a different feed, and the listing tells buyers so.

Where to use it: established apple trees in backyard orchards and home landscapes — and other established fruit trees such as pear, peach, and plum where soil phosphorus is adequate.