Yellow Cactus Dahlias are stunning, summer-to-autumn blooming plants known for their radiant, starburst-like blooms with narrow, spiky, and rolled petals. They grow from tuberous roots (often called bulbs), reaching mature heights of 90 to 120 cm, and thrive in full sun and well-draining, nutrient-rich soil. [1, 2, 3, 4]
Key Cultivation & Care Details
- Planting: Plant the tubers horizontally or with the growth point/eyes facing upward, about 8 cm deep and 15 to 40 cm apart. Ensure soil is warm (above 15°C) and avoid watering until the first sprouts appear. [1, 2, 3]
- Sun & Soil: They require full sun (at least 6-8 hours daily) to produce their signature, bright blooms and need well-draining soil mixed with compost. [1, 2, 3, 4, 5]
- Watering & Feeding: Water deeply every 3-4 days (depending on heat). Apply liquid fertilizer every two weeks during the growing season to encourage abundant flowering. [1, 2, 3]
- Blooming Period: Typically bloom from mid-July until the first frost. [1, 2, 3]
- Popular Varieties: Watch for well-known cultivars like ‘Yellow Star’, ‘Gillian’, and ‘Kennemerland’. [1, 2, 3]
