Environmental StressModerate
Slow Growth in Cannabis
If your plant looks healthy but just isn't growing, the issue is usually environmental — not nutrient-based. Go through the checklist.
What it looks like
- ●Healthy-looking but static — no new growth in a week
- ●Small leaves and short internodes
- ●Plant not getting bushier in veg
Quick diagnostic checks
1Check: light, temp, pH, pot size. One of those is the issue.
2Seedlings grow slow for first 2-3 weeks — be patient
Causes ranked by likelihood
1. Not enough light
Most commonSigns
- ●Light too far or too weak
- ●Stretchy growth
Fix
- ✓Lower LED to 18-24" from canopy
- ✓Upgrade to a stronger light
2. Root-bound
CommonSigns
- ●Plant needs transplanting
- ●Roots circling pot
- ●Water runs right through
Fix
- ✓Transplant to a larger pot (double current size)
3. Cold temperatures
CommonSigns
- ●Tent below 70°F
Fix
- ✓Raise temp to 72-78°F
- ✓Add heater
4. pH out of range
CommonSigns
- ●Runoff pH outside 6.0-6.8
Fix
- ✓Flush with pH 6.5 water
- ✓Feed at correct pH
⚠️When to worry
No growth for 10+ days is a problem. Work through the checklist systematically.
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