Nutrient burn happens when the root zone holds more dissolved fertilizer salts than the plant can take up, and the fix is straightforward: stop feeding, reset the medium, and wait for fresh growth before you feed again. Most plants recover within one to two weeks when the first crispy leaf tips are caught early. Below is the order of operations that works best.
What are the first signs of nutrient burn?
Look for burnt brown or yellow tips on the newest leaves, dark waxy green foliage, and leaves that claw downward instead of reaching for the light. Damage starts at the leaf edges and tips before moving inward, which separates it from a deficiency that usually shows up on older leaves first.
How do you fix nutrient burn step by step?
- Stop all nutrient feeding immediately and water with plain, pH-balanced water.
- Measure the runoff: if runoff EC or PPM is far above your input, salts have built up in the medium.
- Flush with two to three times the pot volume of water when readings are high.
- Remove only fully dead, crumbly leaf tissue and leave partially damaged leaves in place to keep photosynthesizing.
- Ease off light intensity and keep temperatures mild for a few days to reduce stress.
- Wait until new growth comes in a healthy green before resuming any feed.
- Restart at half strength and step up gradually rather than jumping back to the full dose.
What specs and tools do you need?
Target a pH of 6.0 to 6.5 in soil and 5.5 to 6.0 in coco or hydroponics, and keep water between 65 and 70°F. Soil buffers salts better than coco or clay pebbles, so hydro and coco systems usually need a flush sooner. A calibrated pH pen and an EC or PPM meter are the two tools that turn guessing into a measurement, and a simple runoff test tells you whether the root zone has actually been reset.
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How long does recovery take?
Healthy new growth typically appears within five to ten days, though leaves that are already burnt will never turn green again. Judge progress by the newest nodes, not by the damaged fan leaves, and keep feeding lightly until the plant asks for more.
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