Nitrogen Deficiency

Older lower leaves turn uniformly pale yellow and drop. Nitrogen is mobile so the plant cannibalises lower leaves to feed new growth. Very common in late flower - often normal.

What usually causes it

• pH out of optimal range (6.0-7.0 soil, 5.5-6.5 hydro/coco)
• Underfeeding or weak nutrient solution
• Root damage from overwatering
• Late flowering - natural senescence

Related product categories

• Base Nutrients
• Additives & Boosters

Terms worth knowing

• EC (Electrical Conductivity)
• pH

Walk the questions if you are not sure this is the match. The notes above are the same ones the tool ends on.