悟る · diagnose & fix
Cannabis Potassium Deficiency
Nutrient deficiency · also: K deficiency, burnt leaf edges, yellow leaf margins
Yellow-then-brown crispy leaf edges with the leaf center staying green points to low potassium.
Not sure it's potassium deficiency?
Snap a photo and get a free read — no signup. Satoru weighs the visual against the conditions that cause look-alikes, so you treat the real problem.
What it looks like
Older leaves yellow at the MARGINS (edges) and tips, turning brown and crispy, while the center stays greener. Edges may curl up. Different from nitrogen's whole-leaf fade.
Symptoms
- Yellow/brown crispy leaf edges and tips
- Leaf center stays greener than the rim
- Edges curl or look scorched
- Slowed growth
Causes
- Under-supplied potassium
- pH lockout
- Excess calcium/nitrogen competing with K uptake
How to fix it
- 1Verify pH first
- 2Feed a balanced nutrient with adequate potassium for the stage
- 3Avoid over-supplementing cal-mag, which can crowd out K
Prevention
- Balanced feeding; don't mega-dose one nutrient
- Keep pH stable
悟る · how satoru tells it apart
Burnt edges from low potassium look a lot like nutrient burn or light burn — but the fixes are opposite (feed more vs. feed less / dim light). Satoru uses your feed strength and light data to tell them apart.
Commonly confused with: Nutrient Burn, Light Burn, Calcium & Magnesium (Cal-Mag) Deficiency.
Not sure it's potassium deficiency?
Snap a photo and get a free read — no signup. Satoru weighs the visual against the conditions that cause look-alikes, so you treat the real problem.
More plant problems
Educational reference for cultivation troubleshooting. Symptoms overlap — when in doubt, match against your own conditions. Satoru fuses your photo with your logged environment for a grounded read.