Care for Bear's Paw (Cotyledon tomentosa): Brown Spots on Lower Leaves

Problem identification

The plant is likely Bear's Paw (Cotyledon tomentosa), recognizable by its fuzzy appearance and fleshy leaves. Localized brown spots are visible on the lower leaves. There is no evidence of widespread rot, general chlorosis, or severe sunburn.

Possible causes

• Mechanical damage or rubbing: dry spots can result from rubbing against pots, other plants, or handling.
• Surface pests: mealybugs (cottony scale) or mites can cause small lesions on the fuzzy surface.
• Prolonged moisture on leaves: standing water on the surface can create physical spots or promote superficial fungi.
• Poor-draining substrate: a medium that retains too much moisture increases local humidity and favors secondary problems.

What to check now (detailed inspection)

• Inspect leaf axils and the underside of leaves with a magnifying glass for mealybugs, eggs, or fine mite webbing.
• Feel the substrate: ensure the top 2–3 cm are dry before watering.
• Observe ventilation around the plant and whether leaves receive splash from watering or have standing water.

Immediate measures (practical steps)

Cleaning and pruning

• If leaves are severely damaged, cut them off with sterilized scissors to prevent infection foci and improve air circulation.
• For superficial spots without rot, gently clean with a dry or barely damp cloth and allow to air dry.

Pest control

• If you find mealybugs, clean with a cotton swab soaked in 70% alcohol (rub gently to remove them).
• For mild infestations, apply diluted potassium soap or a mild contact insecticide; test first on one leaf before treating the whole plant.
• Monitor for 7–14 days after treatment to check progress and detect reoccurrence.

Watering and substrate

• Water only when the top 2–3 cm of substrate are dry; avoid wetting the leaves.
• If the substrate stays moist for more than 3–4 days, consider repotting into a more porous mix: 50–70% mineral component (pumice, pumice stone, akadama, or similar) combined with cactus/succulent soil.
• Ensure the pot has drainage (hole and drainage layer) to prevent water accumulation.

Ventilation and placement

• Improve air circulation around the plant: a gentle airflow helps dry the leaf surface.
• Avoid extremely humid or poorly ventilated locations; do not frequently mist the leaves.

Follow-up and when to act

• Observe the plant for 7–14 days after applying measures: if the spots do not spread and no new pests appear, continue preventive care.
• Apply localized treatment (potassium soap or mild insecticide) if pest levels increase.
• If spots progress to soft rot or there are signs of widespread foliar disease, consider consulting a specialist with detailed photos and watering/substrate information.

Long-term prevention

• Maintain a well-draining substrate and space out waterings appropriate for a succulent.
• Periodically check leaf axils and undersides for early pest detection.
• Avoid continuous contact between leaves and surfaces that can cause rubbing.

With these steps, Bear's Paw should stabilize and regain a healthy appearance; preventive management of watering, substrate, and ventilation is usually enough to prevent recurrence.