Pocket BotanistCheck these first
- Measure the salinity of your water with a hydrometer.
- Check if the water has become stagnant or cloudy.
- Inspect the leaves for any signs of salt crusting.
Likely causes
High Salinity
Most likelyHow to tell: The tips turn crispy and brown while the rest of the leaf looks dull. This happens when water evaporates and leaves behind too much salt.
What to do: Top off your container with fresh, distilled water to dilute the salt. Check the salinity with a hydrometer and keep it between 10 to 30 parts per thousand.
Poor Water Circulation
PossibleHow to tell: The tips brown and the water starts to smell slightly swampy. This indicates a lack of oxygen for the roots.
What to do: Add a small aquarium air stone to the water to keep it oxygenated. Change 25 percent of the water every 2 weeks to remove waste buildup.
Find out what's wrong with your red mangrove
The list above covers the usual causes. Pocket Botanist looks at a photo of your actual plant and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.
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When to worry
Worry if the browning spreads rapidly toward the leaf base. A tiny bit of brown on the very tip is often just part of the plant's natural salt excretion process.
Stopping it coming back
Keep the water level consistent by topping off with fresh water regularly. Ensure the water is moving or aerated to prevent stagnation.
Keep your red mangrove healthy from here
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Questions people ask
- Do mangroves need salt to grow?
- They can grow in fresh water, but they thrive in brackish conditions. A little salt helps them develop their natural filtration systems.
- Should I trim the brown tips off?
- You can snip them off with clean scissors for aesthetic reasons. Just avoid cutting into the healthy green tissue.
More problems with Red mangrove
Back to the Red mangrove guide
This article was generated with AI from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.