<human>:  How and when do you prune a rose bush?
<bot>: To prune a rose bush, snip off any dead or broken branches with sharp gardening shears. Remove any thin, spindly stems that don’t have many flowers. Cut back the remaining canes by one-third, angling the cuts just above an outward-facing bud. Prune the bush in late winter or early spring before new growth starts.