Preventing Liquidambar Seed Pods: Florel Growth Regulator Application

Homeowners with mature liquidambar (sweetgum) trees seek to stop production of spiky seed pods ("gumballs") without removing the trees. A chemical solution exists.

How Florel Works

Florel® Brand Growth Regulator (active ingredient: ethephon) breaks down into ethylene, a natural plant hormone. Applied at bloom, excess ethylene causes flower abortion—no flowers, no fruit. Timing is critical: spray when flowers are just opening (typically late March–April, depending on zone).

Application Guidelines

• Mix per label (usually 1 qt per 10 gal water for large trees).
• Thorough canopy coverage required—hire a professional with high-pressure equipment for trees >30 ft.
• Apply annually; effect lasts one season.
• Do not spray during wind, rain, or extreme heat (>90°F).

Considerations

• Florel may cause temporary leaf yellowing or drop.
• Not labeled for all liquidambar cultivars; verify label.
• Cost: $150–$300+ per application for large trees.
• Alternative: Accept pods, use a leaf vacuum, or plant male cultivars (e.g., 'Rotundiloba') which are fruitless.

Where to Buy

Available through professional turf/ornamental suppliers (e.g., Monterey Lawn & Garden). Local nurseries may special-order. Always follow label directions.

Florel offers a viable, non-destructive option for managing sweetgum fruit—ideal for high-traffic areas where pods are a nuisance or hazard.