Pecan Tree No Nuts: Water, Zinc, Fertilizer, Pruning Guide

30-Year, 40-Ft Pecan Provides Shade But No Fruit

Owner wants to induce nut production.

Water: Mature tree needs 100–250 gallons/day in hottest summer. Deep watering, not sprinkler. Stress causes nut drop.
Zinc: Almost as important as water. Deficiency: pale leaves, bare branches with tip clusters, dead tops, unfilled nuts. Spray foliage 3–4x early season (leaf bud to mid-June), every 3 weeks. Not in heat.
Fertilizer: Ammonium sulfate. 1 lb per inch trunk diameter (or per year age). Split: mid-March and mid-May. Water deeply before, lightly after.
Pruning: Keep branches at head height. Pinch spring trunk shoots. Pecans are lazy—grow low.
Insects: Spray only when needed. Aphids cause sticky "syrup." Control with OTC aphid spray.

Plant Diseases: Pecan Tree Limb Drop: Drought, Weevils, and Borers; Pecan Nuts Moldy or Shriveled: Water Stress, Not Disease; Stone Fruit Pest Management: Neem Oil for Plum/Peach and Poison Ivy Control; Pecan Tree Nut Problems: Weevils, Scab, and Spray Schedule; Nectarine Fruit Drop at Quarter Size: Natural June Drop; Pomelo Tree Hijacked by Sour Orange Rootstock: Graft Takeover Confirmed; Preventing Sycamore Fruit (Seed Balls) with Florel; Pecan Trees Not Bearing: Fertilize, Water, Soil Test; Loquat Tree Fruiting from Seed; Tree Identification in Phoenix: Why Local Expertise Matters

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