Seed Bank Blog

What Cannabis Leaves Can Tell You

Read your cannabis leaves like a grow report: color, spots, curl and droop point to light, water, pest and nutrient issues you can fix early.

Cannabis plant with pale yellow new leaves at the top

Sulphur Deficiency in Cannabis Plants

Sulphur deficiency turns new cannabis growth pale yellow from the top down. Learn how it differs from nitrogen problems and how to correct it fast.

Cannabis leaves with brown crispy edges and yellow tips

Potassium Deficiency in Cannabis Plants

Potassium deficiency shows as brown, crispy leaf edges and yellow tips. Find out what causes it, how to confirm it and how to get feeding back in balance.

Dark green cannabis plant under a grow light, leaf tips starting to turn down

Nitrogen Toxicity in Weed Plants

Too much nitrogen gives weed plants dark leaves with clawed tips. Learn how to spot nitrogen toxicity, flush it out and set feeding right by stage.

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