Visual Plant Doctor
What's wrong with my plant?
Find the symptom, get the answer. Likely cause, the quick fix, what NOT to do, and how to stop it happening again — in plain English.
Leaves · Older / bottom leaves
Yellowing lower leaves
Likely causes
- Nitrogen deficiency (in veg)
- Natural fade (late flower)
- pH lockout
Quick fix
In veg, feed nitrogen and check your pH. In the last weeks of flower, some lower-leaf yellowing is normal — leave it.
Don't do this
Don't pump nutrients into a plant that's just finishing flower.
Prevent it next time
Feed to the stage and keep pH ~6.0–6.5 in soil, 5.5–6.0 in coco/hydro.
Read more
Still not sure? The AI Plant Doctor can look at your exact situation and give a step-by-step plan.
Educational guidance for home growers — a starting point, not a guarantee. Many symptoms share causes (pH is behind a lot of them). When in doubt, ask the AI Plant Doctor or cross-check a guide.