Why Are the Edges of My Plant's Leaves Browning?

Browning along the edges of a leaf, where the margin crisps while the center stays green, is one of the most common houseplant complaints and one of the most misread. It is rarely a disease and almost always an environmental stress. The edges of a leaf are the farthest point from the stem, so they are the first tissue to suffer when water cannot reach them or when accumulated salts burn the margins.

Because several different problems all produce the same brown edge, the cure depends on reading the surrounding clues: the room's humidity, your watering rhythm, your water quality, and your feeding habits. The damaged tissue itself will not turn green again, so success is measured by whether new leaves emerge clean. Once you correct the underlying stress, the plant grows out of the problem from the inside.

Signs to look for

• A thin to wide band of brown, dry tissue along the leaf margins
• Crispy, papery edges that crumble when touched
• Often a thin yellow halo between the brown edge and the green center
• Browning worst on the oldest or most exposed leaves first
• Edges that brown faster during winter heating season

What causes it

How to fix it

1. 1
   Raise the humidity

   Group plants together, run a humidifier to hold 50 to 60 percent humidity, or set pots on a pebble tray with water below the pot base. This is the single most effective fix for humidity-loving tropicals.

2. 2
   Water consistently and thoroughly

   Water when the top inch or two of soil is dry, then water fully until it drains from the bottom. Avoid both letting the plant dry to a crisp and leaving it sitting in soggy soil.

3. 3
   Flush the soil

   Run water through the pot several times its volume in the sink, letting it drain completely each time, to leach out accumulated salts and minerals. Do this every couple of months for plants prone to edge burn.

4. 4
   Switch your water source

   For fluoride- and chlorine-sensitive plants, water with filtered, distilled, or rainwater, or let tap water sit out overnight so chlorine dissipates before you use it.

5. 5
   Trim and reassess feeding

   Snip off the brown edges following the leaf's natural shape for a tidier look, and cut fertilizer to half strength or pause it if edges keep burning. Judge success by whether new leaves come in clean.

How to prevent it

• Keep humidity around 50 to 60 percent for tropical plants
• Water on a consistent rhythm, never letting soil swing to extremes
• Flush the soil every couple of months to clear salt buildup
• Use filtered or distilled water for fluoride-sensitive species
• Fertilize at half strength and never on dry soil