Some herbaceous plants
are best lifted, divided and replanted if they get over crowded. This applies particularly to Crocosmia and Schizostylis (Kaffir Lilies) which flower sparsely if over crowded. Lift clumps with a fork, divide and replant smaller clumps 9”-12” apart.
which do not like being disturbed e.g. Paeonies or Orchids, benefit from a liberal dressing of blood, fish and bone with the soil being lightly forked around the clumps.
Slugs and snails
are beginning to appear now so start using slug pellets or any other preferred method for their control especially your clumps of Hostas.
Although young growth is only just emerging now is the time to stake those plants
which you know will blow over when in full growth or flower later in the season e.g. Alstroemeria, Anemone japonica, herbaceous Clematis, Monarda. Rather than using canes, light “twiggy” branches of birch, beech or the twiggy tops of bamboos which have been cut and left to defoliate. These can be cut 12”-18” longer than the height required and pushed into the ground through and around the plants to be supported.