Gardenia Sticky Leaves & White Residue: Scale/Mealybug Treatment + Geranium Cutting Tips

Two Problems: Gardenia Pests & Failed Geranium Cuttings

Part 1: Gardenia Infestation – Sticky Leaves & "Dandruff"

The sticky leaves + white powdery bits + brown specks = scale insects (likely) or mealybugs. Both suck sap, secrete honeydew (sticky), and weaken the plant.

Effective Non-Toxic Treatment

1. Alcohol spray: 1 part 70% isopropyl alcohol + 5 parts water + 1 tsp mild soap.
2. Spray to dripping all surfaces: tops/bottoms of leaves, stems, soil line, pot rim.
3. Repeat in 5–7 days for crawlers.
4. Weekly checks for 2 months.

Never spray in sun or >75°F. Test on a few leaves first.

Pro Product: Brand X Foliage Cleaner

Silicon-based, penetrates crevices. Available from Southwest Plantscape Products (800-333-7977). Highly effective for mealybug/scale.

Part 2: Geranium Cuttings Rotting/Shiveling

Cause: Peat pots + overwatering = soggy stems = rot. Or too dry = shrivel.

Better Method: Water Rooting First

1. Take 3–4 inch tip cuttings, remove lower leaves.
2. Place in water (bright indirect light).
3. When roots are 1+ inch, pot in small containers with peat-based mix.
4. Water when top inch dry.

Skip rooting hormone—geraniums root easily without it. Peat pots are the problem; they hold too much water or wick it away unevenly.

Gardenia Long-Term

After pests are gone: bright light, acidic soil, even moisture, high humidity, cool nights. Still challenging—but worth it for the fragrance.