Dracaena Massangeana (Corn Plant) Decline: Fluoride and Overwatering

A corn plant with leaves brown halfway down in a 10-inch pot opposite a bay window, watered weekly, is suffering from two classic issues:

1. Fluoride Sensitivity

Dracaenas are highly sensitive to fluoride in tap water. Symptoms: brown spots, tip burn, yellowing. Solution: Let water sit uncovered 48 hours before use, or use distilled/filtered/rain water.

2. Overwatering

Weekly watering is too frequent for a 10-inch pot. Roots rot without drying periods. Water only when a soil probe shows the root zone is dry. A $10 moisture meter prevents guesswork.

Recovery and Pruning

• Remove brown leaves.
• Once new growth appears, you can cut the cane back to reshape—new tops will sprout.
• Fertilize monthly at most (Miracle-Gro at half strength).
• Expect watering every 2–3 weeks once recovered.

Patience: root regeneration takes weeks. New leaves signal success.