Dahlia 'Cactus' hybrids mixed

240 Seeds

Seeding Dahlia 'Cactus' hybrids (mixed) is an exciting way to grow these dramatic, spiky-petaled flowers. While dahlias are typically grown from tubers, they can be grown from seed—especially the 'Cactus' types, which are often available in mixed seed packets. Here's a step-by-step guide to help you succeed:

🌱 When to Start Seeds

• Indoors: Start seeds indoors 8–10 weeks before the last expected frost.

• Outdoors: In frost-free regions, you can sow directly after the danger of frost has passed.

🧪 Materials Needed

• Dahlia 'Cactus' hybrid seeds (mixed)

• Seed trays or pots

• Seed-starting mix (well-draining and sterile)

• Clear plastic dome or plastic wrap (for humidity)

• Heat mat (optional but helpful for germination)

🧾 How to Sow

1. Fill seed trays or pots with moistened seed-starting mix.

2. Sow seeds about ¼ inch (6 mm) deep.

3. Mist the soil gently to avoid disturbing the seeds.

4. Cover with plastic wrap or a dome to retain moisture.

5. Keep warm: Ideal temperature is 70–75°F (21–24°C).

6. Provide light: Use grow lights or place in a bright window after germination.

7. Germination time: Typically 7–14 days.

🌿 After Germination

• Remove the cover once seedlings emerge.

• Transplant into individual pots once they have 2–3 true leaves.

• Harden off seedlings before transplanting outdoors.

🌞 Planting Outdoors

• Timing: After all danger of frost has passed.

• Location: Full sun (6+ hours a day).

• Soil: Well-draining, rich in organic matter.

• Spacing: About 12–18 inches (30–45 cm) apart.

🧡 Tips for Success

• Dahlias grown from seed may not be identical to the parent plant (especially mixed varieties), but that’s part of the fun!

• These seedlings often form small tubers by the end of the season—these can be dug up and stored for replanting next year.

• Pinch back for bushier growth and more blooms.