Orange Cactus Dahlias are vibrant summer-blooming perennials famous for their striking, spiky, and fully double blooms. Grown from tuberous roots (“bulbs”), they thrive in full sun and well-drained soil, blooming continuously from mid-summer through late fall. These flowers are excellent additions to garden borders and floral arrangements. [1, 2, 3, 4, 5]
Key Growing Details
- Planting Time: Best planted in the spring (or October–December in warmer regions) once the danger of frost has passed. [1, 2, 3, 4]
- Depth & Spacing: Plant tubers 6 to 8 inches deep (or 1–2 inches depending on the variety) with the “eyes” pointing upwards, and space them 15–40 cm apart. [1, 2, 3, 4, 5]
- Sun & Water: Requires full sun and deep watering. If planted in the ground, a thorough watering every 3–4 days is recommended. [1, 2, 3]
- Hardiness: These tubers are typically hardy in growing zones 3–11. However, in cooler regions (Zones 3–7), the bulbs will need to be lifted in the fall to prevent rotting over the cold winter months. [1, 2, 3]
