brown spots (rust) on Philodendron
Quick answer
If your Philodendron has brown spots (rust), the most likely cause is: Rust (Puccinia spp.) presents as multiple small, rust-colored or orange-brown spots that spread across multiple plants in proximity. It is a fungal infection common in dense collections with high humidity.
Start here:
- 1. Isolate contaminated plants immediately.
- 2. Wipe each leaf individually with a neem oil solution, using a fresh paper towel for every leaf to prevent cross-contamination.
Why Philodendron gets brown spots (rust)
Philodendron spp.
Rust (Puccinia spp.) presents as multiple small, rust-colored or orange-brown spots that spread across multiple plants in proximity. It is a fungal infection common in dense collections with high humidity.
How to reverse brown spots (rust) on Philodendron
- 1
Isolate contaminated plants immediately.
- 2
Wipe each leaf individually with a neem oil solution, using a fresh paper towel for every leaf to prevent cross-contamination.
- 3
Remove heavily infected leaves at the base.
- 4
Note: Treated leaves may become photosensitive; provide temporary shade for 7 days post-treatment.
Keep brown spots (rust) off this Philodendron
Increase spacing between plants to at least 12 inches. Optimize ventilation. Conduct weekly underside inspections, as rust often starts as pustules on the bottom of the leaf.
Other Philodendron problems
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