Dahlia Decorative
Cool Flame
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100-110cm -
5-10cm -
Full Sun
100-110cm 
5-10cm 
Full SunDahlia ‘Cool Flame’ is a decorative dahlia that brings a bold, warm glow to the garden. Its fully double blooms are a rich, fiery red, enhanced by dark stems that add a touch of drama and contrast. The flowers have a classic rounded form and a velvety texture that makes them irresistible in both borders and bouquets.
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🌸 Bloom Size: 10–12 cm, fully double with no central disc
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🌿 Height: Grows to about 100–110 cm, with strong, upright stems
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☀️ Sunlight: Thrives in full sun, needing at least 4–6 hours daily
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🪴 Best Use: Ideal for cutting gardens, sunny borders, or as a standout in containers
‘Cool Flame’ blooms from mid-summer through to the first frost, and its vibrant color makes it a favorite for adding warmth and energy to garden designs. It’s also easy to grow and maintain—just keep it well-watered, deadhead regularly, and enjoy the show
- The best time to plant Dahlias here in NZ is September or October, but can be planted anytime from mid August through to late December.
- Dahlias love sun ,so choose a nice sunny spot in your garden. Ideally a spot that gets at least 4 hours of full sun a day.
- Dahlias will grow in almost any soil, but prefer well drained loamy soil conditions.
- Prepare the ground a few weeks before planting by digging over the soil thoroughly and adding a little well rotted compost and an application of general fertiliser.
- Before planting the tubers, apply stakes (for larger varieties) staking after planting damages roots and tubers.
- Plant your Dahlia tubers about 5-10cm deep and about 50cm apart with the eye facing upwards. Water well and keep moist being careful not to over-water.
For a full overview of how to plant Dahlias visit our Gardeners Guide.
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