Calla lily brown leaf tips and edges: causes and what to do
6 results in the diagnosis tree begin with brown tips and edges, 3 of them marked likely when the answers fit. They are ordered here for Calla lily (Zantedeschia aethiopica), using what its sources say about humidity, soil moisture, cold tolerance, watering and feeding and 2 problems recorded for it.
Sources last read 14 September 2026.
Zantedeschia aethiopica, commonly known as calla lily, arum lily, and death lily, is a species of flowering plant in the family Araceae, native to southern Africa in Lesotho, South Africa, and Eswatini. Wikipedia, CC BY-SA 4.0
Native range: S. Africa (seasonally dry tropical). Also sold as African lily, altar lily, Arum Lily, Brosimun aethiopica, Calla aethiopica and Egyptian lily.
What Calla lily’s sources say that bears on this
- Humidity
- ASHRAE recommends indoor relative humidity between 30% and 60%Penn State Extension · read 13 September 2026
- Soil moisture
- Poorly-drainedRHS · read 13 September 2026
- Cold tolerance
- H4 — -10 to -5°CRHS · read 13 September 2026
- Watering
- They can survive in water up to 12" deep, so they suit pond margins or rain gardens.NC State Extension · read 13 September 2026Plant outside in part shade or full sun, in soil that holds moisture; in containers use peat-free potting compost (John Innes No2), or grow it at the margins in water to a depth of 30cm (1ft).RHS · read 13 September 2026
- Feeding
- Pests, diseases and other problems: the leaves and flowers may be eaten by Japanese beetles.NC State Extension · read 13 September 2026
How this shows up on a Calla lily
Edges of the leaves brown while the middle stays sound
Leaves on the side of the calla lily nearest a heater or vent brown at the edges while those on the far side stay clean.
Penn State Extension cites ASHRAE's recommended indoor range of 30% to 60% relative humidity; a heated room in winter drops below it. Air that dry pulls water from the leaf faster than the roots replace it, and the margins are furthest from the supply. That applies while it is grown indoors; its RHS rating of H4 describes a plant that also grows outside, where the air is seldom that dry.
Telling it apart: Whether the damage advances. Dry air marks a leaf and stops; rot keeps going.
Penn State Extension · read 13 September 2026Leaves bruised and browned along the edges after a gale
After a windy night the calla lily shows fresh brown edges and a few torn leaves, all facing the same way.
Its source describes a sheltered spot. In an exposed one, wind both dries the leaves and damages them physically, which is why the marks follow the direction of the weather.
Telling it apart: The pattern of the damage. Tears and bruises point at wind; soft, spreading patches point at rot or disease.
RHS · read 13 September 2026Possible causes, likeliest first for a Calla lily
Most likely too little water
Ranked higher because Calla lily's recorded problems point this way.
- Poorly-drained RHS · read 13 September 2026
Why: Soil dry two inches down leaves the roots nothing to send up, and the leaf edges are the last tissue in line.
What to try:
- Water thoroughly, until it runs from the drainage hole.Useful: pot with drainage holes
- Check the soil with a finger every few days rather than watering on a fixed day.Useful: moisture meter
What would settle it: Water it thoroughly and watch the next new leaves. If they come in with clean edges under steadier watering, the edges were thirst.
Most likely cold
Ranked higher because Calla lily's recorded problems point this way.
Its RHS hardiness rating puts this plant's cold floor at or below freezing, so cold damage in a heated room is unlikely. A frost outdoors, or a night in a cold car, is another matter.
- H4 — -10 to -5°C RHS · read 13 September 2026
Why: Soft, dark patches rather than crisp ones are damaged tissue rather than dried tissue.
What to try:
- Move it away from the glass at night, or keep the curtain on the room side of the calla lily.
- Leave damaged leaves until new growth appears, then remove the worst of them.
What would settle it: Where the calla lily sits at night, and what the glass feels like at that hour. Damage that appeared after one cold night, on the side facing the window, is the pattern.
Most likely a build-up of salts in the soil
- Clay, Loam; pH Acid or Alkaline or Neutral RHS · read 13 September 2026
Why: Minerals from tap water and fertiliser are left behind as water evaporates, and a white crust on the compost or the pot rim is where they show.
What to try:
- Water slowly and heavily until several times the pot's volume has run through the drainage hole, to wash the salts out.Useful: pot with drainage holes
- Scrape off the top layer of crusted compost and replace it.
What would settle it: Scrape the crust. If it is gritty and dissolves in water it is mineral; if it is fluffy it is mould, which is a different problem.
Less likely for a Calla lily, still possible
Questions
- What usually causes brown tips and edges on a Calla lily?
- For Calla lily: most likely too little water, most likely cold and most likely a build-up of salts in the soil.
- How can I tell which one it is on my Calla lily?
- Is the browning crisp and dry, or soft and dark? Crisp and dry; Soft and dark.
- What do Calla lily's sources say about its soil moisture?
- RHS: Poorly-drained.
- What does this look like on a Calla lily?
- Leaves on the side of the calla lily nearest a heater or vent brown at the edges while those on the far side stay clean. Telling it apart: Whether the damage advances. Dry air marks a leaf and stops; rot keeps going.
- Is Calla lily safe to handle while I check it?
- Its sources list it as toxic to cats, dogs and people. Wash your hands after handling the roots or sap, and keep trimmings away from pets.
Other plants that show brown tips and edges
Flamingo flowerBrown brittle margins with a green centre
African violetBrown tips on the newest leaves first
Barberton daisyEdges of the leaves brown while the middle stays sound
Bearded irisLeaf tips go crisp and brown
Bigleaf hydrangeaDry, bruised edges after a cold, windy spell
Bird of paradiseCrisp margins that appear in winter
Something else wrong with the Calla lily?
What this does not cover
This page orders a decision tree's results using a plant's sourced care. It has not seen your plant, its pot or its window, and two problems at once are common: that is the usual reason a confident answer turns out wrong. The questions in the diagnosis tool narrow it further than a list can.