How to Prune canna 'Picasso'?
Deadhead to promote continued flowering. Leave to dieback in autumn

canna 'Picasso' · Canna 'Picasso'
As a patio plant grow in pots of loamless compost in a sheltered site in full sun. Plants can also be planted into a sunny border. Water freely and apply a high potassium feed every 2-3 weeks in the growing season. Lift the rhizomes in autumn when frost blackens the foliage. Store over winter in barely moist compost in frost-free conditions. See canna cultivation for further information
Deadhead to promote continued flowering. Leave to dieback in autumn