How to Treat Black Leg Disease in Houseplants

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Houseplant Disease, Black Leg disease

Black Leg Disease

Black Leg disease is a disease of stem cuttings where the base of the cutting turns black.

The symptoms manifest as oval, sunken, light-brown to black cankers with purple-to-black margins near the base of the stem.

The cause of Black Leg Disease is bacteria and the predisposing factors are soggy soil and overcompaction of the soil which prevents proper drainage.

Many houseplants can be affected by Black Leg Disease but

Pelargonium cuttings are especially susceptible to Black Leg Disease.

The Best Treatment for Black Leg Disease in Houseplants

  • Remove the infected cuttings as soon as possible. Discard or burn the affected cuttings.

  • Maintain the rooting mix on the drier soil whenever you are rooting stem cuttings.

  • Use loose free-draining rooting mix to avoid soggy soil and overcompaction of the soil.

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