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Chlorosis

Pronounced / kloh·ROH·sis /

Yellowing of leaf tissue caused by too little chlorophyll.

Example in a sentence

“Lower fan leaves showing slow chlorosis during early veg often point to a nitrogen shortage.”

Leaf Doctor Yellowing lower leaves: what it is, and when it’s nothing Before anything else: if you're six or more weeks into flower and it's only the bottom leaves, this is probably normal.