Cannabis Cultivation

Close-up of a cannabis plant's new growth showing early boron deficiency, with twisted growing tips and light brown spotting.

Posted in: Cannabis Cultivation

How to Fix Cannabis Boron Deficiency: Symptoms & Recovery

September 1, 2026 • 03:42 AM ET

Cannabis boron deficiency twists new growth and spots leaves. Learn to tell it from calcium, fix the real pH cause, and know what recovers.

Cannabis plant showing manganese deficiency — interveinal yellowing on new top leaves with green veins.

Posted in: Cannabis Cultivation

Manganese Deficiency in Cannabis: Signs, Causes & Fixes

Nate Hammer

August 27, 2026 • 10:50 AM ET

Spot manganese deficiency in cannabis: yellowing between veins on new top leaves, brown spots, and the pH fix by medium. Symptoms, causes and cures.

Flowering cannabis plant with brown, burnt edges on the lower fan leaves signalling a potassium deficiency.

Posted in: Cannabis Cultivation

How to Fix Cannabis Potassium Deficiency: Symptoms & Fixes

Nate Hammer

August 25, 2026 • 08:38 AM ET

Spot cannabis potassium deficiency by its brown leaf edges and burnt tips. Learn the causes, the pH-first fix, and how to avoid potassium toxicity.

Brown, rust-coloured calcium deficiency spots on the new top growth of a cannabis plant.

Posted in: Cannabis Cultivation

How to Fix Cannabis Calcium Deficiency: Brown Spots, New Growth Damage & Cal-Mag

Nate Hammer

August 25, 2026 • 07:47 AM ET

Brown spots on new growth? Learn how to diagnose and fix calcium and cal-mag deficiency in cannabis with medium-specific pH, flushing and dosing.

Close-up of healthy cannabis mid-canopy fan leaves with faint early molybdenum deficiency signs.

Posted in: Cannabis Cultivation

Cannabis Molybdenum Deficiency: Red Leaf Edges, Yellowing & the pH Fix

Nate Hammer

August 24, 2026 • 04:22 AM ET

Molybdenum deficiency in cannabis shows as yellowing middle leaves with red or pink edges. Learn to spot it, fix the pH lockout, and prevent it coming back.

Cannabis plant showing zinc deficiency: yellowing, small new top leaves with green lower foliage.

Posted in: Cannabis Cultivation

How to Fix Cannabis Zinc Deficiency: Yellow New Growth & pH

Nate Hammer

August 21, 2026 • 08:54 AM ET

Cannabis zinc deficiency shows as yellow, small new leaves, usually caused by pH lockout. Fix pH by your grow medium first, then add zinc if needed.

Cannabis cola showing early bud rot with yellowing wilting leaves in late flower.

Posted in: Cannabis Cultivation

Bud Rot in Cannabis: How to Identify, Treat & Prevent Gray Mold

Nate Hammer

August 20, 2026 • 10:17 AM ET

Learn to identify bud rot on cannabis fast - what gray mold looks like inside buds, whether it's safe to smoke, plus how to treat and prevent it.

Cannabis plant with pale yellow new top-growth leaves showing sulfur deficiency, healthy green lower leaves.

Posted in: Cannabis Cultivation

Cannabis Sulfur Deficiency: Spotting Pale New Leaves & Correcting the Feed

Nate Hammer

August 20, 2026 • 09:21 AM ET

Cannabis sulfur deficiency yellows new top growth. Learn to spot the signs, correct root-zone pH for your growing medium, and recover the plant properly.