Alstroemeria – where they are grown for pure display or cut flower, should have their stems “pulled” and not just cut. This initiates more flowering stems. Where growing for cut flower re-cut the stems before putting into water.
Crocosmias should now be at their best. Deadhead them if you do not want them to naturalise by seeding over the garden.
Anemone japonica and it’s cultivars make a fine display in sun or semi-shade but they may need their roots physically contained to stop them spreading too far.
Now is the time to plant Spring Flowering Bulbs of your choice. Squirrels and mice love digging up and eating newly planted Crocus and Snowdrops. To prevent them “sniffing” out the bulbs scatter bits of grated scented soap around which should deter them from finding the bulbs.