Foxglove Thinning and Transplanting: Biennial vs Perennial

A gardener's foxgloves are growing in bunches and asks if they should be separated now for faster growth.

Identify the Type

• Biennial foxgloves (Digitalis purpurea): Form a rosette year one, bloom year two, then die. They self-sow prolifically.
• Perennial foxgloves (D. grandiflora, D. lutea): Return yearly from the same crown.

Action by Type

Biennial (most common): Thin seedlings when small. If second-year plants are blooming, leave them to set seed for next generation. Transplanting now risks disturbing bloom.

Perennial: Divide in early spring or fall when dormant.

Spacing Benefits

Proper spacing (12–18 inches) improves air circulation, reduces disease, and yields larger plants.

Let biennials reseed naturally; divide perennials at the right time.