# Stretched, thin plant with long gaps between nodes: likely causes and fixes

> Stretched, thin plant with long gaps between nodes on cannabis is most often Normal stretch after the flip or Not enough light. How to tell them apart, the fix for each and what recovery looks like.

Also called: leggy, stretching, too tall and thin, long internodes, reaching for the light.

Run the checker with this sign: https://genetixbay.com/knowledge/diagnose/?at=whole&s=stretchy

## Likely causes, most likely first

### Normal stretch after the flip (Possible)

- Kind: Normal ageing; urgency: Low urgency
- Fix: Most cultivars grow 1.5-3x in the first 2-3 weeks after the flip. Plan height before the flip; supercrop or LST through it.
- Recovery: Stretch stops by about weeks 3-4 of flower.
- Confirm: Measure PPFD at the canopy top: Use a quantum (PAR) meter, or a calibrated phone app as a rough guide, at the top leaves in a 5-9 point grid. Compare with the stage target: seedlings 100-300, veg 300-700, flower 800-1,200 µmol/m²/s at ambient CO2. Bleaching and taco at the top above ~1,100 point to light; stretch below ~300 in veg points to too little.
- Article: [Stretchy, leggy cannabis: a differential](https://genetixbay.com/knowledge/diagnosis/stretching.md)

### Not enough light (Possible)

- Kind: Light; urgency: Low urgency
- Fix: Bring PPFD to stage targets: seedlings 100-300, veg 300-700, flower 800-1,200 µmol/m²/s. Yield rose linearly with PPFD from 120 to 1,800 in a controlled trial. Lower canopy buds under ~300-400 µmol/m²/s make larf: thin or lollipop the shaded bottom, or train flat.
- Recovery: New internodes shorten within a week; denser buds on the following weeks of growth.
- Confirm: Measure PPFD at the canopy top: Use a quantum (PAR) meter, or a calibrated phone app as a rough guide, at the top leaves in a 5-9 point grid. Compare with the stage target: seedlings 100-300, veg 300-700, flower 800-1,200 µmol/m²/s at ambient CO2. Bleaching and taco at the top above ~1,100 point to light; stretch below ~300 in veg points to too little.
- Article: [Stretchy, leggy cannabis: a differential](https://genetixbay.com/knowledge/diagnosis/stretching.md)

## Note

Guidance, not a guarantee. The checker weighs common causes against what you tell it; confirm with the tests before you treat, change one thing at a time and watch the new growth.