How to Prune raspberry 'Polka'?
Prune all canes to ground level in late winter

raspberry 'Polka' · Rubus idaeus 'Polka'
Grow in rows between parallel wires for support. Mulch with acidic material such as composted bark. May have the potential to become a nuisance if not managed well. See raspberry cultivation
Prune all canes to ground level in late winter