The Ultimate Guide to Summer-Flowering Bulbs

pink dahlias summer bulbs

What Are Summer-Flowering Bulbs?

Summer-flowering bulbs grow from underground storage organs, bloom in warm months, and require seasonal planting and care. They are best planted in spring after the last frost.

Best Summer-Flowering Bulbs For Continuous Blooms

  • Dahlias – Long-lasting, vibrant flowers.
  • Gladiolus – Tall, colorful flower spikes.
  • Lilies – Fragrant, elegant blooms.

For Low-Maintenance Gardens

  • Begonias – Shade-loving, bright flowers.
  • Canna Lilies – Bold, tropical foliage.
  • Agapanthus – Drought-resistant, hardy blooms.

For Pollinator-Friendly Gardens

  • Crocosmia – Attracts bees and butterflies.
  • Tuberose – Highly fragrant, supports pollinators.
  • Alliums – Structural plants, pollinator magnets.

For Containers & Small Spaces

  • Oxalis – Compact, decorative foliage.
  • Caladium – Ornamental, shaded pots.
  • Freesias – Fragrant, delicate flowers.

How to Plant Summer Bulbs

  1. Choose a location – Full sun for most, partial shade for some.
  2. Prepare the soil – Well-draining, enriched with compost.
  3. Plant at the right depth – 2-3 times the bulb height.
  4. Water thoroughly – Keep soil moist but not waterlogged.
  5. Apply mulch – Retains moisture and controls weeds.

Care and Maintenance

  • Watering – Keep soil evenly moist, avoid waterlogging.
  • Fertilizing – Balanced liquid feed every 2-4 weeks.
  • Staking – Support tall plants like gladiolus and dahlias.
  • Deadheading – Remove faded flowers to encourage reblooming.
  • Pest Control – Monitor for aphids, slugs, and fungal issues.

How to Overwinter Summer Bulbs

  1. Allow foliage to die back.
  2. Dig up tender bulbs before frost.
  3. Dry bulbs in a ventilated area.
  4. Store in a cool, dry place.
  5. Replant in spring.

Troubleshooting Common Issues

Problem

Cause

Solution

No sprouts

Planted too early

Wait until after the last frost

Weak stems

Low sunlight or too much nitrogen

Increase sunlight, reduce fertilizer

Yellow leaves

Overwatering

Improve drainage, adjust watering

Few blooms

Overcrowding or poor soil

Space bulbs properly, add phosphorus

Pests

Aphids, slugs, fungal issues

Use neem oil or organic deterrents

Why Plant Summer Bulbs?

  • Continuous color from early summer to autumn.
  • Low maintenance with minimal effort.
  • Attracts pollinators like bees and butterflies.
  • Great for cut flowers and floral arrangements.
  • Versatile for beds, borders, and containers.

Final Thoughts

Summer-flowering bulbs bring lasting beauty, structure, and variety to any garden. Selecting the right bulbs, planting them correctly, and following simple care steps ensures a vibrant, thriving display year after year.

For a high-quality selection, visit The Garden House's collection.