Triumph Tulip ‘Black Diamond’ (Tulipa hybrida) – Dark Purple to Black Blooms

🌷 Deep Purple-Black Blooms for a Bold Spring Display 🌷

Triumph Tulip ‘Black Diamond’ is a striking mid-season tulip with rich, velvety deep purple to near-black blooms. Its classic Triumph tulip shape, strong upright stems, and dramatic colouring make it perfect for garden beds, borders, pots, and cut flower arrangements.

Supplied as dormant dry bulbs, ‘Black Diamond’ performs best in cool to temperate climates and can also be grown as an annual in warmer areas when bulbs are properly chilled before planting.

Ready Now 
Subject to availability

🌱 Growing & Care Guide

Botanical Name: Tulipa hybrida
Common Name: Triumph Tulip ‘Black Diamond’
Supplied As: Dormant dry bulbs
Flowering Time: September to October
Height: Approx. 50cm
Aspect: Full sun to semi-shade
Frost Hardy: Yes
Planting Depth: 10–15cm deep
Spacing: Approx. 10cm apart

🌏 Growing Zones & Suitable Areas

Zone 1 – Cool Temperate & Alpine Regions
Suitable for direct planting. Pre-chilling is generally not required.
Examples: Tasmania, Victorian highlands, ACT, cooler parts of NSW and SA.

Zone 2 – Temperate Climates
Usually suitable for direct planting, though warmer areas may benefit from 6 weeks of pre-chilling.
Examples: Victoria, southern NSW, Adelaide Hills and parts of SA.

Zone 3 – Mediterranean & Mild Winter Areas
Pre-chilling for 6–8 weeks is recommended before planting.
Examples: Perth, coastal SA and parts of Sydney.

Zone 4 – Warm Temperate & Coastal Areas
Pre-chilling for around 8 weeks is recommended before planting in May.
Examples: Brisbane, coastal NSW and warmer parts of WA.

🌼 Planting & Maintenance

Plant tulip bulbs from March to May, depending on your climate. In warmer regions, plant after refrigeration, usually around May.

Choose a well-drained soil enriched with compost. Tulips dislike wet feet, so raised beds or pots are ideal where drainage is poor.

Water well once shoots begin to emerge. A high-nitrogen top dressing can be applied when the first shoots appear. After flowering, remove spent blooms but allow the foliage to die back naturally so the bulb can store energy.

Once the foliage has yellowed, bulbs can be lifted and stored in a cool, dry, ventilated area.

🌡️ Refrigerating Tulips in Warmer Climates

Tulips need a cold period to flower well. In areas without a reliable winter chill, place bulbs in the fridge for 6–8 weeks before planting.

Store bulbs in a paper or ventilated bag and keep them away from ripening fruit and vegetables. Do not freeze bulbs.

Pre-chilled bulbs often grow stronger, taller, and flower more reliably in warmer regions.

🌿 Growing Tulips as Annuals in Warm Climates

In warmer parts of Australia, tulips are often best treated as annuals. Chill the bulbs first, then plant into garden beds or large pots in late autumn.

For pots, use a quality free-draining potting mix and keep containers in a cool, shaded position until shoots reach around 5cm. Then move them into a brighter position for flowering.

💐 Why Choose Tulip ‘Black Diamond’?

✔ Dramatic deep purple to near-black blooms
✔ Classic Triumph tulip form
✔ Strong upright stems, ideal for pots and garden beds
✔ Excellent contrast colour for spring displays
✔ Suitable for cut flowers
✔ Best in cool to temperate climates, or grown as an annual in warmer regions

🌿 FAQs

Do I need to pre-chill Tulip ‘Black Diamond’?
In cool climates such as Tasmania, the Victorian highlands, ACT, cooler NSW and the Adelaide Hills, pre-chilling is usually not required. In warmer areas such as Sydney, Perth, Brisbane and coastal NSW, chilling for 6–8 weeks is recommended.

Can I grow Tulip ‘Black Diamond’ in pots?
Yes. Tulips grow beautifully in pots and containers, provided the pot is deep enough and has good drainage.

Can I leave tulip bulbs in the ground year after year?
In colder climates, some tulips may return, though flowering can reduce over time. In warmer climates, they are usually best treated as annuals.

When will Tulip ‘Black Diamond’ flower?
Tulip ‘Black Diamond’ usually flowers from September to October, depending on your climate and planting time.