Heat Stress vs Deficiency? (Tacoing & Curling)
Heat/light stress can mimic deficiencies with tacoing and edge curl. Location on the plant and environment tell the story.
Heat stress vs deficiency? Tacoing/curling leaves—see the differences and analyze your plant in seconds.
Common Causes
- High canopy temps or PPFD
- Low airflow / stagnant canopy
- VPD out of range causing stomata stress
- True deficiencies (K, Ca) overlapping
How to Tell Which One You Have
Top leaves taco/canoe first in heat/light stress. Deficiencies often start mid/lower leaves and show color changes, not just shape.
FAQ
Should I raise lights or feed more?
If tops only are tacoing, lower PPFD/heat first. If color shifts appear mid-plant, check feed balance.
Can VPD fix tacoing?
Often. Keep VPD in range and increase airflow across the canopy.
Is this wind burn?
Wind burn browns edges on the fan side; heat stress tacos leaves near the light.