Lobelia (Lobelia X Speciosa ‘Compliment Deep Pink’)

Plant: Table of Contents

All About Lobelia (Lobelia x speciosa ‘Compliment Deep Pink’)


Lobelia, scientifically known as Lobelia x speciosa ‘Compliment Deep Pink’, is a delightful and versatile plant with beautiful deep pink flowers that add a pop of color to any garden or landscape. In this comprehensive guide, we will delve into the culture, uses, characteristics, and care requirements of this stunning plant.

What is Lobelia (Lobelia x speciosa ‘Compliment Deep Pink’)?

Lobelia x speciosa ‘Compliment Deep Pink’ is a hybrid species that belongs to the bellflower family, Campanulaceae. It is a clump-forming perennial that produces upright spires of vibrant deep pink flowers. This plant is famous for its long-lasting blooms and its versatility in various gardening settings. With the right care and attention, this stunning plant can thrive in gardens, containers, and even hanging baskets.

Key Takeaways

Lobelia (Lobelia x speciosa ‘Compliment Deep Pink’)

  • Scientific Name: Lobelia x speciosa ‘Compliment Deep Pink’
  • Common Name: Lobelia
  • Variety: Hybrid
  • Flower Color: Deep Pink
  • Family: Campanulaceae
  • Plant Type: Perennial



  • Ornamental: Lobelia x speciosa ‘Compliment Deep Pink’ is primarily cultivated for its ornamental purposes. Its stunning blooms make it a favored choice for adding color to gardens, borders, and containers.
  • Landscaping: This plant can be used in various landscaping designs to add a touch of elegance and vibrancy to outdoor spaces.
  • Cut Flowers: The exquisite flowers of Lobelia x speciosa ‘Compliment Deep Pink’ make an excellent addition to floral arrangements.


  • Watering Frequency: Regular watering is essential, particularly during dry spells, to keep the soil consistently moist.
  • Watering Technique: Water the plant at the base to avoid wetting the foliage, which can lead to diseases and issues with rot.


  • Sun Exposure: Lobelia x speciosa ‘Compliment Deep Pink’ thrives in locations with full sun to partial shade. However, in hot climates, it benefits from some shade during the hottest parts of the day.


  • Fertilization Schedule: Apply a balanced, water-soluble fertilizer every 4-6 weeks during the growing season to promote healthy growth and continuous flowering.


  • Soil Type: Well-draining, fertile soil is ideal for Lobelia x speciosa ‘Compliment Deep Pink’.
  • pH Level: It prefers a slightly acidic to neutral soil with a pH range of 6.0-7.0.


  • Deadheading: Regular deadheading helps to prolong the flowering period and encourages new blooms.
  • Maintenance Pruning: Trim back any leggy or untidy growth to maintain a compact and tidy appearance.


  • Propagation Methods: Lobelia x speciosa ‘Compliment Deep Pink’ can be propagated from seeds, stem cuttings, or by division.

Container Popularity

  • Container Gardening: This variety of lobelia is well-suited for container gardening. Its compact growth habit and vibrant blooms make it an excellent choice for adding color to patios, balconies, and decks.

Common Diseases

Lobelia x speciosa ‘Compliment Deep Pink’ is generally resilient to diseases. However, it may be susceptible to certain issues, including:
Downy Mildew: This fungal disease can affect the foliage, causing yellowing and a fuzzy, gray mold to appear on the undersides of the leaves.
Root Rot: Overly wet and poorly-draining soil can lead to root rot, causing the plant to wilt and decline.

Disease Diagnosis

If your Lobelia x speciosa ‘Compliment Deep Pink’ is displaying signs of disease, it’s crucial to identify the problem promptly and take appropriate action. Use the following steps for diagnosis:
1. Inspect the foliage for any discoloration, spots, or fuzzy growth.
2. Check the soil moisture levels to assess the risk of root rot.
3. Consult a local horticulturist or plant expert for further diagnosis and treatment recommendations.

Common Pests

Lobelia x speciosa ‘Compliment Deep Pink’ is relatively resistant to pests. However, certain pests may pose a threat, including:
Aphids: These small, sap-sucking insects can cluster on the tender new growth, causing distortion and stunted growth.
Spider Mites: These tiny pests can cause stippling or yellowing of the foliage, leading to a decline in plant health.

Botanist’s Tips

Here are some tips from botanists and experienced gardeners to help you grow and care for Lobelia x speciosa ‘Compliment Deep Pink’ successfully:
Provide Adequate Air Circulation: To prevent the development of fungal diseases, ensure that the plant receives good air circulation, especially in humid climates.
Monitor Soil Moisture: Keep the soil consistently moist but not waterlogged to avoid issues with root rot and fungal diseases.

Fun Facts

  • The genus name Lobelia is in honor of the Flemish botanist Matthias de Lobel.
  • Lobelia x speciosa ‘Compliment Deep Pink’ attracts pollinators like butterflies and hummingbirds to the garden with its nectar-rich flowers.

Links to External Resources

To further explore the world of Lobelia x speciosa ‘Compliment Deep Pink’ and enhance your knowledge, check out the following external resources:
1. The Royal Horticultural Society – Lobelia
2. Missouri Botanical Garden – Growing Lobelia
3. University of Florida IFAS Extension – Lobelia Growing Guide
4. American Society for the Prevention of Cruelty to Animals – Toxicity of Lobelia to Pets

In conclusion, Lobelia x speciosa ‘Compliment Deep Pink’ is a captivating and versatile plant that can add charm and beauty to any garden or landscape. By understanding its culture, care requirements, and potential challenges, you can cultivate this stunning variety of lobelia successfully and enjoy its delightful blooms for years to come.

Picture of Peter Taylors

Peter Taylors

Expert botanist who loves plants. His expertise spans taxonomy, plant ecology, and ethnobotany. An advocate for plant conservation, he mentors and educates future botanists, leaving a lasting impact on the field.