Dahlia Growing and Care: From Tuber to Spectacular Blooms

Why Grow Dahlias?

Dahlias offer unmatched variety in size, form, and color—from tiny pompons to dinner-plate giants. They bloom from midsummer until frost, providing spectacular color when many other flowers are fading.

Starting with Tubers

• Purchase plump, firm tubers with visible "eyes"
• Wait to plant until soil reaches 60°F (after last frost)
• Plant 4-6 inches deep with eyes facing up
• Space 18-24 inches apart depending on variety size
• Don't water until growth appears

Growing Conditions

Dahlias need:

• Full sun (6-8 hours minimum)
• Rich, well-drained soil
• Regular deep watering once established
• Protection from strong winds

Pinching and Staking

For bushier plants with more blooms:

1. When plants reach 12-16 inches, pinch out the center growing tip
2. Install stakes at planting time to avoid damaging tubers later
3. Tie stems loosely as they grow
4. Remove side buds for larger (but fewer) dinner-plate blooms

Ongoing Care

• Feed every 2-3 weeks with low-nitrogen fertilizer
• Deadhead regularly to prolong blooming
• Watch for slugs, especially on young growth
• Mulch to retain moisture and keep roots cool

Overwintering Tubers

In cold climates, tubers must be dug and stored:

1. After first frost blackens foliage, cut stems to 4-6 inches
2. Carefully dig tubers without damaging
3. Let dry for a few days in a frost-free location
4. Store in peat moss or sawdust at 40-50°F
5. Check periodically for rot or shriveling