Giant Ball Dahlia Mix

How to Plant and Care for dahlias

When to Plant

• Wait until all danger of frost has passed and soil is at least 60°F.
• Store tubers in a cool, dark, dry place until ready. Do not refrigerate.

Planting Dahlia Tubers in the Ground

• Choose a full sun location with well-drained soil.
• Dig a hole at least 2" deep and wide enough for the tuber or clump.
• Place tuber with the eyes or cut stem facing up (or lay on its side if unsure).
• Cover with soil. Do not water immediately unless soil is dry.

Planting in Containers

• Use a large container (minimum 12" deep) with drainage holes.
• Fill with high-quality potting mix. Plant tuber as above.
• Place in full sun and water only when the soil dries out.

Ongoing Care

• Water deeply 2–3 times per week once growth appears; keep soil evenly moist.
• Mulch to retain moisture and reduce weeds.
• Support with stakes as plants grow to prevent flopping.
• Fertilize monthly with a low-nitrogen fertilizer (5-10-10 or similar).
• Deadhead spent blooms to encourage more flowers.

In Zones 7 and colder, dig up tubers after first frost and store indoors for next year.

Frequently Asked Questions: Giant Ball Dahlia Mix

• 1. When and how should I plant my Giant Ball Dahlia tubers?
  Plant the tubers in spring after the danger of frost has passed and the soil has warmed. Choose a sunny spot with well-draining soil. Plant each tuber about 2 inches deep with the “eye” (growing point) facing up. Space them about 24 inches apart to give them room to grow.
• 2. How tall do these dahlias get, and do they need support?
  Giant Ball Dahlias typically grow 3 to 4 feet tall. Thanks to their thick stems, they’re sturdier than most—but staking is still a smart idea, especially in windy areas or once those big blooms start to weigh in. A simple stake or cage will do the trick.
• 3. Will they come back every year?
  In zones 8–10, yes—these dahlias can overwinter in the ground. In colder zones, you’ll need to dig up the tubers after the first frost and store them in a cool, dry place over winter. They’re perennial by nature, but need a little help in chillier climates.
• 4. Can I grow Giant Ball Dahlias in containers?
  Absolutely. Choose a large container (at least 12 inches deep) with good drainage. Container-grown dahlias are great for patios or balconies and give you flexibility to move them for the best sunlight. Just be sure to water regularly—they dry out faster than in-ground plants.
• 5. How long do the flowers last, and when can I cut them?
  You can start harvesting blooms midsummer and enjoy them through fall. For the best vase life—up to 5 days—cut the blooms early in the morning when they're fully open. Use sharp, clean snips and place them straight into cool water.