For the longest vase life cut Larkspur (Delphinium consolida) when one-third of the blossoms are open.

For drying cut Larkspur (Delphinium consolida) when two-third’s of the blossoms are open.

Of course when cutting for yourself you can cut blooms whenever you like, the vase life May be shorter but you’ll get the benefit of both the garden and an indoor display.