Dracaena deremensis ‘Roehrsii’ Mid‑Leaf Browning: Nutrient, Light, or Fungus?

The Case

5‑ft Dracaena in penthouse, high light, no direct sun. Mature leaves brown at base, spreads. Tried watering changes, removing leaves—no stop. Cuttings show same.

Reference Data

• Low fertility → weak color, narrow leaves.
• Low P → mid/older leaf dieback.
• Fe deficiency → interveinal chlorosis.
• High light/heat → leaf heat, bleaching.
• Pests: scale, mealybug, thrips.
• Root rot from overwatering.
• Fusarium leaf spot: rust lesions, yellow halos.
• Phyllosticta: brown spots, yellow halos.

Organic Option

Atomic Grow for fungus/disease.