Hosta Pest Damage: Insecticidal Soap Beats Baking Soda/Vinegar

Your first-year hostas show holes in leaves, and your sodium bicarbonate + vinegar spray turned leaves orange and curled. The spray likely caused phytotoxicity (chemical burn), especially in sun.

Immediate Fix

1. Stop the homemade spray. It's not labeled for hostas and burned them.
2. Buy ready-to-use insecticidal soap (Safer's, Garden Safe, etc.).
3. Spray thoroughly — tops, undersides, stems — at first sign of chewing.
4. Repeat weekly until damage stops.

Common Hosta Pests

• Slugs/snails: Irregular holes, slime trails. Night feeders. Beer traps, diatomaceous earth, iron phosphate bait (Sluggo).
• Earwigs: Ragged edges. Rolled newspaper traps.
• Caterpillars: Clean holes, frass. Bt (Bacillus thuringiensis).
• Deer/rabbits: Clean bites, whole leaves gone. Fencing/repellents.

Culture for Resilience

• Morning sun / afternoon shade.
• Consistent moisture (mulch 2").
• Divide crowded clumps (improves air flow).
• Varieties with thick/waxy leaves (e.g., 'Sum and Substance', 'Blue Angel') resist slugs better.

Insecticidal soap is safe, effective, and cheap. Your hostas will push fresh leaves once pests are controlled.