Nutrient burn is a common cannabis growing issue, but it is also one of the easiest to fix if you act early. Telltale signs include crispy, yellow or brown leaf tips that curl upward, along with slowed growth. With a quick flush and a reset of your feeding schedule, most plants bounce back within a week or two.
how to fix cannabis nutrient burn
What Is the Fastest Way to Fix Cannabis Nutrient Burn?
The fastest fix is to stop feeding immediately and flush your growing medium with pH-balanced water. This removes excess salts and gives the roots a chance to recover. After flushing, resume feeding at half strength and increase slowly only if the plant shows no new damage.
- Stop all nutrient feeding for at least 3–5 days.
- Flush with plain, pH-adjusted water (6.0–6.5 in soil, 5.5–6.0 in hydro).
- Check runoff EC or PPM to confirm salt buildup is dropping.
- Remove severely damaged leaves only if they are more than 50% dead.
- Resume nutrients at 50% of the previous dose.
- Keep temperature and humidity stable to reduce stress.
- Monitor new growth for 7–10 days before increasing feed.
For a proper flush, you will need a pH meter, a TDS/EC meter, and a flushing solution or plain filtered water. In soil, run three times the pot volume of water through the medium. In coco or hydroponics, change the reservoir and run a mild nutrient solution at low strength. Always adjust water temperature to 65–75°F to avoid shocking the roots.
cannabis nutrient burn treatment
How Long Does It Take for Plants to Recover from Nutrient Burn?
Damaged leaves will not heal, but new growth should appear healthy within 7 to 14 days after you correct the nutrient strength. Full recovery depends on how early you catch it and how healthy the root system was before the burn.
how to fix cannabis nutrient burn
Can You Fix Nutrient Burn During Flowering?
Yes, but be gentle. Reduce nutrient strength by half and avoid heavy flushing late in flower, as it can strip needed phosphorus and potassium. Instead, feed plain pH-balanced water for one or two cycles, then resume a bloom formula at a lower dose.
Do You Always Need to Flush for Nutrient Burn?
Not always. If you catch it at the very first tips, simply skipping one feeding and lowering the next dose can be enough. Flushing is best when you see burnt tips across many leaves or when runoff EC is very high.
If you order flushing solutions, pH meters, or test kits from our shop, we ship within one business day in discreet packaging. Returns are accepted within 30 days on unopened items, and our support team is happy to help you choose the right supplies for your grow.