What's Wrong with My Cornstalk Dracaena?

Dracaena fragrans is one of the most fluoride-sensitive houseplants grown indoors. Fluoride accumulates in leaf tissue over many waterings and kills the cells at the leaf tips. The brown tip appears with a pale yellow band separating the dead tissue from the green, which is the hallmark pattern for this species.

Dracaena fragrans is native to humid highland forests in Africa. Dry indoor air pulls moisture from the long strappy leaves faster than the plant can replace it, and the tips die first because they are the furthest point from the roots.

Dracaena fragrans stores water in its thick woody cane, which means it needs less frequent watering than most leafy houseplants. Soggy soil causes the roots to rot, and the plant pulls resources from the oldest leaves first. Yellowing starts at the lower leaves and moves upward.

As Dracaena fragrans puts energy into new growth at the top, it sheds the lowest older leaves. If one or two leaves at the very base are yellowing and the rest of the plant looks good, this is normal. The cane gradually lengthens and the skirt of lower leaves drops away over time.

When the soil stays waterlogged long enough, rot moves up from the roots into the base of the cane itself. The cane goes soft, dark, and may smell. At this point the root system is gone and the rot is working upward through the dense woody stem.

The long strappy leaves of Dracaena fragrans are stiff and upright when the plant is well-hydrated. Because the thick cane stores some moisture, this species holds out longer than most before showing drought stress. When drooping finally appears, the soil is usually bone dry and has been for a while.

Rotting roots can't support the long leaves, and the plant sheds them to reduce the load. Leaf drop from overwatering usually comes with yellowing first, then the leaves fall. The soil will feel wet or smell stale.

Dracaena fragrans drops leaves when jolted by a cold draft or a dramatic change in environment. The long leaves detach cleanly at the base. This often follows moving the plant, placing it near a drafty window in winter, or a sudden drop in room temperature.

Fine webbing between the long leaves and along the cane, with pale stippled speckling on leaf surfaces. Dry indoor air is the main driver, and Dracaena fragrans is particularly prone because it is often kept in low-humidity offices and living rooms.

White cottony clusters where the long leaves meet the cane and in the tight sheaths at the base of each leaf. Mealybugs thrive in the dense leaf clusters at the top of a Dracaena fragrans cane, where the overlapping leaf bases create sheltered pockets.

Small brown waxy bumps on the cane and along leaf midribs. Scale insects are hard to spot on the woody brown cane of Dracaena fragrans because their coloring blends in, and an infestation can grow large before the owner notices.