Troubleshooting worksheet
Leggy seedlings
Seedlings have long, pale, weak stems and lean sharply toward light.
Look before acting
A visual match narrows questions. It does not prove a diagnosis.
Compare the location, pattern, affected plant parts, recent weather, watering, and changes in care before choosing a response.
Possible causes
Keep the list open at first.
01Insufficient light
02Light source too far away
03Excess warmth after germination
04Crowding
05Starting too early
Questions to answer
Look at the whole plant and root zone.
- How far is the light from the leaves?
- How many hours is it on?
- Are seedlings crowded?
- How long until outdoor planting?
Low-risk actions
Change one thing at a time.
- Increase usable light without overheating leaves.
- Thin crowded seedlings.
- Provide gentle airflow.
- Restart fast-growing crops when seedlings are too early or severely weakened.
Working checklist