Short answer
Brown spots on a Snake Plant are most often caused by root rot from overwatering or fungal infections triggered by excess moisture. The most effective fix is to inspect the root system for decay, trim away affected areas, and move the plant into a well-draining, succulent-specific potting mix with a strict watering schedule.
Snake Plants (Dracaena trifasciata) are hardy succulents that thrive on neglect, so brown spots are usually a clear signal that something has fundamentally disrupted their dry, airy environment. While small, dry brown tips might be cosmetic, larger or spreading spots often indicate that the plant's roots are suffocating or that environmental humidity is trapped against the leaves.
Excess water prevents oxygen from reaching the roots, leading to cellular collapse and secondary infections that manifest as brown, mushy spots or patches at the base of the leaf. This is the most common cause of death for Dracaena trifasciata.
Check: Gently wiggle the leaf base; if it feels soft, mushy, or pulls away easily, the root system is likely rotted.
Fix: Remove the plant from its pot, trim away all black, slimy roots, and repot into fresh, dry cactus soil; wait at least a week before watering again.
If the leaves stay damp or the ambient air is stagnant, opportunistic fungi can create brown or reddish-brown lesions on the foliage. This often occurs if water is poured directly into the 'rosette' of the plant rather than the soil.
Check: Look for distinct, circular brown spots with a yellow halo or a fuzzy texture under high magnification.
Fix: Increase air circulation around the plant, prune off the worst-affected leaves, and avoid overhead watering to keep foliage perfectly dry.
While usually manifesting as leaf curling or wrinkling, extremely prolonged drought can lead to dry, brittle brown tips or marginal browning as the plant sacrifices outer tissue to conserve moisture.
Check: Check the soil; if it is pulled away from the edges of the pot and feels like hardened dust, the plant is severely dehydrated.
Fix: Slowly rehydrate the soil by placing the pot in a saucer of water for 30 minutes to allow the dry medium to wick up moisture, then resume a 3-4 week schedule.
When to worry
You should take urgent action if the brown spots are mushy, emit an odor, or are spreading toward the center of the plant, as this indicates active root rot that can kill the entire specimen within days.
Not sure which cause it is?
Upload a photo of your Snake Plant and get a diagnosis in seconds.
Diagnose my Snake PlantYes, you can trim off the dead brown tips using sterile scissors, but try to cut just outside the healthy green tissue to avoid causing further stress to the leaf.
Fungicides are rarely necessary for indoor Snake Plants; correcting the watering schedule and improving air circulation is almost always more effective than chemical treatments.
Sunburn usually appears as bleached, pale, or yellow patches rather than dark brown spots; if your spots are dark and necrotic, look to water and soil issues first.
Consistent with guidance from: University of California Integrated Pest Management Program, American Horticultural Society.