Troubleshooting
Zantedeschia 'Picasso' problems — and how to fix them
Zantedeschia 'Picasso' (Zantedeschia 'Picasso') is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Rhizome rot
The most common killer; cold, wet compost rots the rhizome. Use free-draining mix, water moderately, and keep dry in dormancy.
Loss of variegation/colour
Insufficient light flattens the purple-and-white contrast and the leaf spotting; move to brighter indirect light.
Botrytis on spathes
Pale areas are prone to grey mould if water sits on them; water at the base and improve air circulation.
Aphids
Gather on new shoots and flower stems; rinse off and treat with insecticidal soap before they distort growth or spread virus.
Prevent zantedeschia 'picasso' problems before they start
Most zantedeschia 'picasso' issues are care-mismatch, not bad luck. Dial in the basics:
Looking for zantedeschia 'picasso' in general rather than its problems? Read the full zantedeschia 'picasso' care guide — light, water, soil and feeding.
Zantedeschia 'Picasso' problems — FAQ
Why is my zantedeschia 'picasso' rhizome rot?
The most common killer; cold, wet compost rots the rhizome. Use free-draining mix, water moderately, and keep dry in dormancy.
Why is my zantedeschia 'picasso' loss of variegation/colour?
Insufficient light flattens the purple-and-white contrast and the leaf spotting; move to brighter indirect light.
Why is my zantedeschia 'picasso' botrytis on spathes?
Pale areas are prone to grey mould if water sits on them; water at the base and improve air circulation.
Why is my zantedeschia 'picasso' aphids?
Gather on new shoots and flower stems; rinse off and treat with insecticidal soap before they distort growth or spread virus.