Troubleshooting a Declining Magnolia 'Alexandria' in Georgia

A gardener in Georgia planted two Magnolia 'Alexandria' in March. One is thriving; the other has droopy leaves that fall off at a touch. A pellet insecticide was applied around both; the other is fine. Miracle-Gro was applied today.

Immediate Concerns

• Over-fertilizing a stressed plant (Miracle-Gro today) can burn roots and worsen decline. Stop fertilizing.
• Insecticide pellets (likely systemic) rarely cause such rapid decline unless misapplied (overdose, placed against trunk).
• Root issues: Poor drainage, planting too deep, girdling roots, or root rot (Phytophthora) are common in magnolias.
• Transplant shock: March planting in GA heat can stress roots.

Diagnostic Steps

1. Check soil moisture at root ball: should be moist, not soggy.
2. Inspect root flare: ensure it's at grade, not buried.
3. Scratch bark on branches: green = alive; brown = dead.
4. Look for pests: scale, borers, spider mites.

Recommended Actions

• Do not fertilize further this season.
• Water deeply once a week if no rain.
• Apply mulch 2–3 inches, kept 6 inches from trunk.
• Contact your county Extension agent or a certified arborist for on-site diagnosis. Magnolia 'Alexandria' may have specific regional issues.

Early intervention by a local expert offers the best chance of saving the tree.