Perennial Plant Care Guide - Delphinium, Dianthus, Foxglove, Geranium
Delphinium To control weeds and retain moisture, apply a thin layer of compost each spring, followed by a 2 inch layer of mulch. These plants need watering during the summer if rainfall is less than 1 inch per week. The soil should never dry out. To keep plants strong and to keep hollow stalks from