There are a very large number of perennials that make excellent cut.
The following should certainly be included in the list:, Alstrcemeria, , Campanula, , maximum, , , Doron-icum, , Echinops, , , Gypsophila, Helenium, Helleborus (the Christmas rose), , , Papaver nudicale (Iceland Poppy), Pceony, Pyrethrum, Scabiosa caucasica, Solidago, , Trollius, and large numbers of Michaelmas Daisies.
Naturally some varieties are more suited than others to cut flower work.
For the cut flower border the perennials will again be planted in rows 300 mm (1 ft) apart, but in the case of the taller kinds like delphiniums a space of 600 to 900 mm (2 to 3ft) will be allowed in the rows, and the plants from row to row will be staggered. The great thing is to go on with the standardized scheme, as thus any of the sundries used for staking, covering, hoeing, etc., fit any bed perfectly.
With perennials it is important to keep the flower heads cut to prevent them seeding even if they are not required for the house and it is advisable not to leave the rows down for more than three years. With Chrysanthemum maximum it is not a bad plan to lift the plants up every other year. Pceonies, which hate disturbance, may be left down eight or nine years.