Leaf spot on houseplants
Common causes of leaf spot and the first things to check, summarized from 8 PlantGrail care records across 7 plants (as of ).
What causes leaf spot on houseplants?
It depends on the plant and how it is kept, so check the plant pages below. For Philodendron, the records explain it like this: Bacterial leaf spot on Philodendron (caused by Xanthomonas spp., particularly X. euvesicatoria strains) manifests as angular water-soaked lesions that expand into brown necrotic spots with yellow halos. Xanthomonas pathogens are host-specific to Araceae family plants and spread via splashing water, contaminated tools, or handling wet foliage.
Common first steps
- Identify bacterial vs fungal: bacterial spots are angular with water-soaked margins; fungal spots are circular with defined borders
- Remove severely infected leaves with sterilized shears; dispose in sealed bag (do not compost)
- Apply copper-based bactericide weekly for 3-4 weeks following label directions
Plants with records for leaf spot
Most records first. Open a plant for its own causes and fixes.
- rubber plant Ficus elasticaPlant care guide
- philodendron Philodendron spp.Plant care guide
- pothos Epipremnum aureumPlant care guide
- syngonium Syngonium podophyllumPlant care guide
- money tree Pachira aquaticaPlant care guide
- hoya Hoya spp.Plant care guide
- dieffenbachia Dieffenbachia seguinePlant care guide
Questions about leaf spot
Which plants have the most records for leaf spot?
rubber plant, philodendron, pothos, syngonium, money tree and 2 others.
Can leaf spot be prevented?
Avoid overhead watering; sterilize pruning tools with 70% alcohol between uses; maintain moderate humidity (50-60%) with good air circulation; quarantine new plants for 14 days; avoid handling plants when foliage is wet.
What are these records?
This page summarizes 8 PlantGrail care records on leaf spot. Records describe care topics; they are not counts of observed plants or treatment outcomes.