Introducing Crepe Myrtle ‘Diamonds in the Dark Blush’
Crepe myrtle Diamonds in the Dark Blush (Lagerstroemia indica ‘DIABLUSH’) is a standout addition to any Australian garden. This compact cultivar from the innovative ‘Diamonds in the Dark’ series captivates with its rich burgundy-black foliage that emerges in spring and matures to deep purple-black through summer. Topped with clusters of delicate blush pink flowers from late spring to autumn, it delivers year-round interest and a dramatic contrast that’s hard to beat.
Bred for superior performance, this variety thrives in our diverse climates, from subtropical Queensland to temperate Victoria. Standing at just 2-3 metres tall and wide, it’s perfect for small gardens, patios, or as a feature in larger landscapes. Its drought tolerance once established makes it a low-maintenance gem for water-conscious Aussie gardeners.
Whether you’re after a colourful screen, a pot specimen, or a hedge alternative, crepe myrtle Diamonds in the Dark Blush brings reliable beauty without the fuss.
Key Features of Crepe Myrtle ‘Diamonds in the Dark Blush’
Foliage and Flowers
- Foliage: New growth is a glossy burgundy-black, darkening to near-black in full sun. In cooler months, it turns fiery red-orange for an autumn spectacle.
- Flowers: Profuse blush pink crinkled blooms on long panicles, appearing reliably from November to April in most regions. Each flower cluster measures 15-20 cm, creating a cascading effect.
- Bark: Smooth, peeling cinnamon-brown bark adds winter appeal, peeling to reveal mottled patterns.
Growth Habit and Size
This deciduous small tree or large shrub grows to 2.5-3 m high and 2-2.5 m wide, with a vase-shaped form. It’s slower-growing than traditional crepe myrtles, reaching maturity in 5-7 years.
Climate Suitability
Adapted to USDA zones 7-10, it excels in Australian conditions:
- Subtropical (QLD, NSW north coast): Loves the heat; flowers longer here.
- Temperate (VIC, TAS, SA): Handles light frosts to -10°C; protect young plants.
- Arid inland (NSW, SA): Exceptional drought resistance post-establishment.
- Coastal: Salt-tolerant, non-invasive roots suit seaside gardens.
Avoid heavy clay soils or poorly drained sites, as root rot can occur.
Planting Crepe Myrtle ‘Diamonds in the Dark Blush’
Best Time to Plant
Plant in autumn or early spring to allow root establishment before extremes. In tropical areas, any time except peak wet season works.
Site Selection
- Sun: Full sun (6+ hours daily) for maximum foliage colour and blooms. Light shade reduces flowering.
- Soil: Well-drained, slightly acidic to neutral (pH 5.5-7.5). Amend heavy soils with gypsum or compost.
- Spacing: 2 m apart for hedges; 3 m for specimens.
Step-by-Step Planting Guide
- Dig a hole twice as wide and as deep as the root ball (typically 40 cm pot).
- Mix in 20-30% compost or well-rotted manure with native soil.
- Position so the root flare sits at soil level – avoid burying too deep.
- Backfill, firm gently, and water thoroughly (20-30 L per plant).
- Mulch 5-7 cm deep with organic matter (e.g., lucerne or bark chips), keeping it away from the trunk.
For pots, use a 50-60 cm diameter container with premium potting mix. Elevate on pot feet for drainage.
Care and Maintenance
Watering
- Establishment: Deep water weekly (30-50 L) for the first 12 months, especially in sandy soils.
- Mature: Drought-tolerant; water during prolonged dry spells (every 2-4 weeks).
- Tip: Use drip irrigation for efficiency in hot Aussie summers.
Fertilising
Apply a balanced, slow-release fertiliser (e.g., NPK 8:4:10) in early spring. For vibrant foliage, add a micronutrient blend with iron and magnesium. Avoid high-nitrogen feeds to prevent soft growth prone to pests.
In pots, feed every 3 months with liquid seaweed extract.
Mulching
Replenish annually to suppress weeds, retain moisture, and regulate soil temperature. Pine bark or sugar cane mulch works best.
Pruning Crepe Myrtle ‘Diamonds in the Dark Blush’
Pruning enhances shape, bloom production, and prevents ‘witch’s broom’ (weak twiggy growth).
When to Prune
Late winter (July-August) after frost risk, before new growth.
How to Prune
- Young plants: Tip-prune lightly after first flush to encourage branching.
- Mature trees:
- Remove suckers at base.
- Thin crossing or rubbing branches.
- Cut back spent flower stems to a pair of buds (20-50 cm).
- For size control, reduce height by one-third, cutting to outward-facing buds.
- Avoid ‘topping’ – it ruins form and invites disease.
Use sharp secateurs, disinfect between cuts. Expect a flush of dark foliage post-pruning.
Pests and Diseases
Crepe myrtle Diamonds in the Dark Blush is remarkably resilient, but watch for:
Common Issues
- Powdery mildew: White coating on leaves in humid, shaded spots. Improve air flow; spray with potassium bicarbonate.
- Aphids/scale: Sticky honeydew. Hose off or use eco-oil.
- White lace bugs: Mottled leaves. Systemic insecticide or neem oil.
Prevention
- Plant in sun/wind for ventilation.
- Avoid overhead watering.
- Healthy, stressed-free plants resist most problems.
No major diseases in Australia; it’s free from myrtle rust.
Propagation
Cuttings (Easiest)
Take 10-15 cm semi-hardwood tip cuttings in late summer. Dip in rooting hormone, plant in perlite/vermiculite mix under mist. Roots in 4-6 weeks; 70% success rate.
Seed
Flowers set viable seed, but seedlings vary. Sow fresh in spring; germination in 3-4 weeks at 20-25°C.
Grafted plants ensure true-to-type colour.
Landscaping Ideas for Australian Gardens
- Feature tree: Espalier against a wall or standalone in lawn.
- Hedges/screens: Plant 1.5-2 m apart for 2 m privacy.
- Containers: Patio wow-factor; pair with grasses like Lomandra.
- Mixed borders: Contrast with silver-leafed natives (e.g., Westringia) or perennials.
- Street planting: Tough enough for councils.
In drought-prone areas, it’s a star for water-wise gardens. Combine with other ‘Diamonds in the Dark’ varieties like ‘Snow’ for a pink-white duo.
Where to Buy in Australia
Available at specialist nurseries like Plantmark (VIC), Bunnings (nationwide), or online from Daleys Fruit. Expect $30-60 for 20-30 cm pots; larger specimens $100+.
Troubleshooting Common Problems
| Issue | Symptoms | Solution |
|---|---|---|
| No flowers | Few/poor blooms | More sun, prune correctly, low phosphorus fertiliser |
| Pale foliage | Yellowing leaves | Iron chelate; acidic soil |
| Leggy growth | Sparse branches | Reduce shade, prune harder |
| Root bound in pot | Slow growth | Repot to 10 cm larger |
Why Choose Crepe Myrtle ‘Diamonds in the Dark Blush’?
In Australia’s challenging climates, this variety shines for its:
- Bold, dark foliage unlike any other crepe myrtle.
- Long-lasting blush pink flowers.
- Compact size for modern gardens.
- Minimal care needs.
It’s a proven performer from Brisbane to Ballarat, earning top marks from growers for reliability. Plant one today and watch your garden sparkle.
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