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 Botanic Garden >> Gardening >  >> Question and Answer >> Plant Species >> Perennials

Yellowing Lily of the Nile (Agapanthus) Leaves: Causes and Cures

Agapanthus leaf yellowing stems from four main causes; identify yours by checking conditions.

Cause & Fix Table

CauseSymptomsFix
OverwateringSoggy soil, mushy rootsImprove drainage; water only when top 5 cm dry
UnderwateringCrispy leaf tips, pot gapDaily water in heat; soak thoroughly
Nutrient deficiencyPale yellow, stunted12-12-12 slow-release spring + midsummer
Insufficient sunLeggy, pale, few flowersMove to 6+ hours direct sun

Pot Culture

  • Ensure drainage holes; use gritty mix (2:1:1 loam:compost:grit).
  • Repot every 2–3 years.
  • Winter: keep cool (5–10 °C), barely moist.

Correct the limiting factor; new growth will be green.

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