Lagerstroemia 'Diamonds in the Dark Red Hot'

Red Hot Crepe Myrtle / Black Diamond Red Hot Crepe Myrtle

Botanical Name: Lagerstroemia 'Diamonds in the Dark® Red Hot'
Family: Lythraceae
Origin: East Asia
Plant Type: Deciduous tree

Overview

Turn heads all summer with dramatic near-black foliage topped by vivid red crepe-textured blooms. ‘Red Hot’ is a compact crepe myrtle bred for intense colour, heat tolerance and reliable flowering in South Australia’s temperate–Mediterranean climate. Easy, water-wise once established, and dazzling in pots or as a statement feature.

Key Features

• Mature Size: 2–3 m H × 1.5–2.5 m W (small, upright tree)
• Growth Rate: 30-50 cm per year under good conditions
• Foliage: Glossy deep burgundy to near-black spring–summer; orange-red autumn colour before leaf-fall
• Flowers: Large rich red trusses (crepe-ruffled) on new season’s growth
  
• Seasonal Interest: Black foliage contrast + summer–early autumn bloom; attractive mottled bark with age
• Wildlife Value: Nectar for bees and pollinators
• Tolerance: Heat and drought once established; light frost; urban/coastal exposure; good mildew resistance
• Planting Density: Avenue/specimen: 1 tree per 9-16 m² (3-4 m apart), depending on mature canopy
• Pet Friendly: Generally non-toxic to cats and dogs

Where It Works Best

• Sunlight: Full sun (6+ hrs) for best foliage colour and flower set
• Soil: Well-drained loam, sandy loam or clay loam; avoid waterlogging
• Water Needs: Establishment: 2 deep soaks/week for 8-12 weeks. Established: deep soak every 10-14 days in summer; monthly in winter if dry.
• Maintenance: Prune lightly in late winter (after leaf-drop) to shape and encourage new flowering wood; mulch in spring; slow-release feed in early spring
• Lifespan: 25-50 years
• Climate Zones: Suited to temperate and Mediterranean SA gardens, including coastal areas
• Soil pH: Slightly acidic to neutral

Landscape & Design Ideas

• Feature focal point: Plant as a bold specimen near entries, courtyards or poolscapes where the black foliage and red blossom steal the show.
• Driveway or path allee: Repeat at 3–4 m centers for a dramatic, low-canopy avenue with minimal pruning needs.
• Designer contrast: Pair with silver/blue foliage (e.g., Westringia, Lomandra, Dianella) or white gravel for high-impact colour contrast.

Why You Will Love It

‘Red Hot’ delivers premium designer colour with very little fuss—inky foliage, months of glowing red flowers, and a compact size that fits modern blocks and large pots. It’s tough, heat-smart and showy, bringing instant curb appeal and reliable seasonal drama that makes the rest of your garden pop.