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Plant details
Dahlias originate from Mexico and Guatemala where they produce single flowers. Enthusiasts in Europe in the 18th century bred many different forms, which now produce blooms that range from 5cm to 30cm (2in to 12in) in diameter. The rich purple, cactus flowerheads of 'Purple Gem' make a bold statement in the garden. It is an excellent variety for the back of the border or in cut-flower displays. Lift the tubers after the first frosts and bring indoors to overwinter in a frost-free place.
Family: Asteraceae
Genus: Dahlia
Cultivar: Purple Gem
Plant type: Tender perennial
Flower colour: Purple
Foliage colour: Mid-green
Feature: Flowers
Sun exposure: Full sun
Soil: Well-drained/light, Clay/heavy, Acidic, Chalky/alkaline, Moist, Sandy
Hardiness: Tender
Skill level: Experienced
Height: 125cm
Spread: 40cm
Time to divide plants: March to April
Time to take cuttings: March to April
Flowering period: July to September
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