Digitalis parviflora: complete guide

Overview

Digitalis parviflora, called Portuguese Foxglove, is an elegant biennial from Northern Spain. This plant is notable for its slender spikes of small purple flowers, less imposing but highly refined compared to other Digitalis species.

Worth including in wild gardens and summer borders, Digitalis parviflora adds sophistication to perennial plantings.

Appearance and bloom

Digitalis parviflora reaches 40-60 cm height with hairy, light green foliage. Flowers are relatively small, about 0.75-1 cm long, arranged densely along slender spikes.

Flowers are typically deep purple-brown, sometimes with yellowish tints. Blooming extends from July through September, much later than many garden plants.

Ideal location

Plant in full sun to light shade. Blooms best with at least 4-6 hours of direct sunlight daily. In very warm climates, afternoon semi-shade helps prolong blooming.

This plant grows well in well-ventilated positions.

Soil

Digitalis parviflora prefers well-draining, fertile to moderately fertile soil. pH can range from acidic to alkaline (6.0-7.5 ideal).

Amend heavy soils with compost or humus for moisture retention. Ensure good drainage; waterlogging causes disease.

Watering

Water regularly, especially during first-season growth. Leaves may wilt in extreme drought. Keep soil evenly moist but not waterlogged.

Once established (second year), Digitalis parviflora is quite drought-tolerant.

Pruning

Minimal pruning required. You may remove spent flowers to encourage more side flowering, but many plants produce multiple spikes naturally.

Allow self-seeding by leaving some seed spikes for plant renewal next season.

Maintenance calendar

• April-May (Year 1): Sow seed or transplant seedlings; water regularly
• June-July (Year 1): Plant establishes; growth accelerates
• August-September (Year 1): Possible late-season bloom, but most energy goes to foliage
• October-December (Year 1): Foliage prepares for overwintering
• January-March (Year 2): Early spring growth; minimal watering
• April-May (Year 2): Flowering begins; water moderately
• June-September (Year 2): Flowering peaks

Winter hardiness

Digitalis parviflora is hardy to USDA zone 4 (-30 C) as a biennial, but gradually disappears from very cold gardens where it doesn't self-seed well. Growing in zone 5 and warmer works best.

Companion plants

Combine with other summer-blooming wild plants like Knautia and Scabiosa. Plant in groups for dramatic effect.

The slender form works beautifully in cottage garden style plantings.

Closing

Digitalis parviflora adds refinement to summer gardens with its late-blooming purple spikes. With minimal support, this plant thrives in nearly any well-drained soil.

Seed available from seed suppliers. Self-sow in spring for blooming next year. Discover more at gardenworld.app/en!