Just noticed some brown spots on the upper leaves of my plant (pic below) , here's her info:
Barney's Farm Amnesia Lemon Grown in soil (Biobizz light mix) - pot size 20litres
Roughly 3 months old, 4.5 weeks into flowering
Feeding Canna nutes - Terra flores 5ml in 1.5l, next day Canna boost 1.5ml in 1l, Canna PK13/14 2ml in 0.85l
Awaiting delivery of kit to establish humidity and temp
From the plant diagnosis pages I've looked at, the most likely suggestion is a boron or Calcium deficiency - but could it be low humidity as well?
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