Roses. Prune hybrid perpetual and most other hardy roses inApril when sap begins to flow and buds start to swell. At this timedead wood may be most easily distinguished and mulch should notbe disturbed earlier. Memorial roses and rambler roses should bepruned just after the flowering season to produce wood for the nextyear's bloom.
Other things being equal, the pruning determines the quantity andrize of flowers. Severe pruning will produce the largest and bestflowers; less severe pruning is productive of a large crop of averageflowers; medium pruning produces a large crop of smaller blooms(Plate V, Page 24).