Through the years I've tried just about everyone for bulbs but A.D.R. is tops. It's a family run business and the service levels and expertise are as good as the product they sell. My clients rave about the results we get with A.D.R. and that makes me happy.

Paul Keyes , Paul Keyes Associates

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Tulipa Triumph 'Prinses Irene'

Tulip

Prinses Irene is a Triumph tulip, known for its warm orange petals brushed with smoky purple flames. It blooms in mid-spring, standing on sturdy stems above broadly lance-shaped leaves edged with a soft, silvery-green margin.

This variety reaches 12 to 14 inches tall and thrives in full sun with rich, well-drained soil. The blooms are large, typically 4 to 5 inches in diameter, making them a striking presence in garden plantings and floral arrangements. A beloved classic with a distinctive, painterly look.

Bulk Tray of 700 Bulbs, Size 11/12 cm

357

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When should I plant Tulipa Triumph 'Prinses Irene'?

Growing and Maintenance Tips for Tulipa Triumph 'Prinses Irene'

Planting: Plant in fall when soil temperatures drop below 55°F. Set bulbs 6–8 inches deep with the pointed end up. Triumph tulips adapt well to borders, containers, and large-scale plantings thanks to their uniform habit and wide color range.
Spacing: Space bulbs 4–6 inches apart. For a cohesive display, plant in groups of 10 or more—ideal for both solid color blocks and curated mixes.
Light: Full sun encourages strong, upright stems and bold color. While light shade is tolerated, performance is best with at least 6 hours of direct light.
Soil: Provide well-drained, neutral to slightly acidic soil (pH 6–7). In poorly drained areas, amend soil or raise beds to prevent bulb rot.
Watering: Water after planting to settle the soil. During spring, water only in extended dry spells—too much moisture can shorten bloom duration.
Temperature & Dormancy: Requires 12–16 weeks of cold (below 50°F) for proper rooting and flower initiation.
Fertilization: Apply a balanced bulb fertilizer when planting and again in spring as foliage emerges to support stem strength and bloom quality.
Pests: Squirrels may dig recently planted bulbs—use mulch or mesh to deter them. Deer will eat buds and foliage, especially in early spring, so apply repellents or fence vulnerable areas.
Disease: To prevent Botrytis (Tulip Fire), plant only healthy bulbs in sunny, airy spots. Avoid overhead watering. Remove and destroy any infected plant material—do not compost. Rotate planting locations yearly and avoid replanting in previously affected sites for three years.