Common Marijuana Plant Problems
Are your marijuana plants showing signs of problems? Discoloration, blotches, drying up, and wilting are just some of the ways the leaves of a marijuana plant will let you know something is wrong. They are not as happy as they would like to be. Stressing the marijuana plant can lead to low yield or even its demise. First rule out these things:
- Plants have plenty of water
- PH is 5.6 – 5.9
- Your light cycles are correct
- Your medium is not saturated
- Constant fresh air
With the above ruled out, use the below to help diagnose your plants problem!
Bigger leaves are turning a yellowish color while the smaller leaves are green.
- Nitrogen deficiency – add nitrate of soda or organic fertilizer.
Older leaves will curl at edges, turn dark, possibly with a purple cast.
- Phosphorous deficiency – add commercial phosphate.
Mature leaves develop a yellowish cast to least veinal areas.
- Magnesium deficiency – add commercial fertilizer with a magnesium content.
Mature leaves turn yellow and then become spotted with edge areas
turning dark gray.
- Potassium deficiency – add muriate of potash.
Cracked stems, no healthy support tissue.
- Boron deficiency -add any plant food containing boron.
Small wrinkled leaves with yellowish vein systems.
- Zinc deficiency – add commercial plant food containing zinc.
Young leaves become deformed, possibly yellowing.
- Molybedum deficiency – use any plant food with a bit of molybdenum in it.