Tree Dahlia
Imperialis
-
5-10cm -
Full Sun
5-10cm 
Full SunDahlia Imperialis Pink
The original Tree Dahlia is a towering, almost tropical-looking plant with thick, bamboo-like stems and large, finely divided leaves. Late in the season, clusters of nodding mauve-pink flowers appear high above the garden, each with a single row of petals surrounding a golden-yellow centre.
It needs plenty of room, protection from strong winds and sturdy support as it grows. Flowering is naturally late, so it performs best in warmer, frost-free areas where the blooms have time to open.
Height: Approx. 3–4m
Flower size: Approx. 10–15cm
Type: Single Tree Dahlia
Flowering time: Late summer through to autumn
Position: Full sun to light shade
Best for: Sheltered gardens, tall backdrops and statement planting
- 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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