Plant care guide
Bird of Paradise Brown Spots: Leaf Spot, Scorch or Scale?
Updated
Why does my Bird of paradise have brown spots?
Brown spots on a bird of paradise are most often fungal leaf spot, which NC State Extension lists for this plant, or scorch after a sudden move into strong sun. Scale insects, spider mites, cold and a dry root zone also leave brown marks. Spot shape, texture and position separate them.
What to do first
Look at a spot closely and turn the leaf over. Remove leaves with spreading, circular spots and keep foliage dry. Scrape off scale, move a scorched plant out of hot sun, and check the mix if the browning starts at the edges.
Bird of paradise leaves are large, so every brown mark is on show. NC State Extension says the plant is usually pest and disease free, and that leaf spot may cause yellow or brown spots on the leaves (NC State: Strelitzia reginae). Spots are not always disease, though. Check what kind you have before treating.
Match the spot to the cause
| What you see | Most likely cause |
|---|---|
| Round brown spots with yellowish margins, sometimes ringed, multiplying | Fungal leaf spot |
| Water-soaked spots with a yellow halo, sometimes sticky ooze | Bacterial leaf spot |
| Dry tan or brown patches on the sunniest leaves after a move | Sun scorch |
| Small, immobile raised bumps on leaves or stalks that scrape off with a fingernail | Scale |
| Fine pale speckling turning bronze, dull or faded leaves | Spider mites |
| Brown, crisp edges with dry, light mix | Underwatering |
| White or straw-colored patches after cold water splashed the leaves | Cold water spotting |
Disease spots
Clemson Extension’s disorders factsheet describes fungal leaf spots as small brown spots with yellowish margins. They may show a target pattern and tiny black dots in the dead tissue. Clemson says splashing water spreads the fungi. University of Maryland Extension adds that spots can run together into large blotches (UMD: fungal leaf spots).
Clemson describes bacterial spots as water-soaked, sometimes with a yellow halo or sticky ooze. The University of Hawaii’s Crop Knowledge Master lists Botrytis leaf blight and Pseudomonas bacteria among bird of paradise diseases (UH CTAHR: Bird of Paradise).
Scorch, cold and water
Sun scorch. Iowa State University Extension calls leaf scorch a sunburn on the leaves. It says the damage is permanent and often follows a quick move into much brighter light (Iowa State: environmental problems). The RHS advises full light with shade from hot sun for plants under glass (RHS: Strelitzia reginae). Bird of paradise likes sun, so this is usually about sudden change, not too much light overall.
Cold water. Clemson says watering with cold water or splashing the leaves sometimes causes white or straw-colored spots.
Dry roots. Clemson says brown tips and edges come from hot, dry air, improper watering, insect feeding and salt buildup.
Pests
UF/IFAS Extension names scale as the main pest of bird of paradise (UF/IFAS: FPS-563). The Hawaii database lists several scale species. Clemson describes scales as small, immobile insects from 1.5 to 13 mm (1/16 to 1/2 in) across that suck sap (Clemson HGIC 2252).
The RHS lists glasshouse red spider mite and mealybugs too. Clemson says spider mites cause light speckling and a faded look, then bronzed or yellow leaves.
What to do
- Isolate the plant if you suspect disease or pests.
- Remove badly spotted leaves. UMD advises picking off and destroying them. Cut leaf stalks near the base with clean tools.
- Keep the leaves dry. Water the mix, not the foliage. UMD advises watering early in the day and improving air movement.
- Scrape off scale. Clemson says early scale can be removed with a fingernail. An insecticidal soap labeled for indoor plants can help against the young crawlers.
- Rinse mites from leaf undersides and repeat checks weekly.
- Acclimate before moving into sun. Iowa State advises changing light levels slowly over several weeks.
- Use room-temperature water and water thoroughly when the mix has dried slightly.
Spotted tissue will not heal. Judge progress by new leaves. If a leaf yellows while the mix stays wet, check the roots with our root rot guide. For overall care, see the bird of paradise care guide and our scale insects guide.
Related guides
Other bird of paradise problems we cover: curling leaves, drooping, not blooming, overwatering, yellow leaves.
References
- NC State Extension Gardener Plant Toolbox: Strelitzia reginae
- Clemson Cooperative Extension HGIC 2251: Houseplant Diseases & Disorders
- University of Maryland Extension: Fungal Leaf Spots on Indoor Plants
- University of Hawaii CTAHR Crop Knowledge Master: Bird of Paradise
- UF/IFAS Extension FPS-563: Strelitzia reginae, Bird of Paradise
- Iowa State University Extension: Diagnosing Houseplant Problems from Improper Environmental Conditions
- Clemson Cooperative Extension HGIC 2252: Common Houseplant Insects & Related Pests
- RHS: Strelitzia reginae
How this guide was put together: NC State Extension, Clemson Cooperative Extension, University of Maryland Extension, University of Hawaii CTAHR, UF/IFAS Extension, Iowa State University Extension and RHS guidance.