Indoor Lime Tree Scale & Pollination: Bath, Oil, and Bees

Managing Scale and Getting Fruit on Container Citrus

An 8-year-old, 2-foot potted lime with recurring brown scale, spiderweb-like debris (likely mealybugs or scale honeydew + dust), and first-time flowers needs two things: pest cleanup and pollination.

Scale/Mealybug Eradication

1. Wash the tree: Lukewarm soapy water (dish soap) + soft brush. Rinse thoroughly. Do this outdoors or in shower.
2. Apply neem oil: 100% cold-pressed, diluted per label. Spray all surfaces—top/bottom leaves, stems, soil surface. Neem deters crawlers and has residual repellency.
3. Repeat weekly × 3.
4. Systemic option: Imidacloprid granules in soil if not harvesting fruit soon (check label PHI).

Pollination for Fruit Set

• Citrus are self-fertile but need pollen transfer.
• Outdoors: bees, flies, wasps do it.
• Indoors: you be the bee. Use a small brush to transfer pollen from anthers to stigma mid-morning when flowers are open.
• Or move plant outdoors during bloom (if frost-free).

Culture for Long-Term Health

• Pot in 50/50 cactus mix + perlite.
• Full sun (6+ hrs) or strong grow light.
• Water when top 2" dry. Fertilize with citrus formula (6-4-6 + micros) monthly Mar–Sep.
• Repot every 2–3 years; root-prune if staying same pot.

An 8-year-old lime at 2 feet is stunted—likely rootbound or underfed. Repot, feed, and give sun. Fruit will follow.