Cardinal Flower

Lobelia 'Starship Blue'

Lobelia 'Starship Blue'

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Product description

Lobelia × speciosa 'Starship Blue', commonly known as Cardinal Flower, is a striking perennial that brings vibrant color to gardens from mid to late summer. Its tall spikes of deep purple-blue flowers rise above clumps of fresh green foliage, creating a bold statement in borders and beds. This compact, upright plant is well-suited for adding vertical interest and rich hues to garden designs.

Thriving in deep, fertile, and consistently moist soils, 'Starship Blue' performs best in full sun to partial shade. It's an excellent choice for areas with damp conditions, such as near water features or in bog gardens. Regular watering is essential, especially during dry spells, to maintain its lush appearance and promote prolific blooming. Applying a dry winter mulch can help protect the plant and extend its lifespan, as it can be short-lived under certain conditions.

Ideal for cottage and informal gardens, 'Starship Blue' not only enhances aesthetic appeal but also attracts pollinators, supporting local biodiversity. Its vibrant flowers make it a favorite among hummingbirds and butterflies. Gardeners should be aware that all parts of the plant are toxic if ingested and may cause skin irritation; wearing gloves when handling is advisable. Additionally, monitoring for slugs will help ensure the plant remains healthy and vigorous.

Please Note: Images are for illustrative purposes only and designed to be a representation of the item(s) being sold. Depending on seasonality, deciduous plants may be supplied in their dormant state and without leaves. Plants may also be pruned back, lower than stated heights, to encourage new growth.

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Plant specs, care guide & tips

Key features

Abundant Flowers
Long Blooming Period
Low Maintenance
Perfect for Pots

Specifications

Botanical Name
Lobelia 'Starship Blue'
Plant type
Colour
Eventual Height
0.5 - 1m
Eventual Spread
Up to 0.5m
Hardiness
Hardy
Life Cycle
Deciduous
Sun Requirement
Full Sun
Growth Rate
Average

When to plant

JanFebMarAprMayJunJulAugSepOctNovDec
Planting
Period of Interest

Planting and period of interest times are general guidelines and may vary based on your location and conditions. For best results, consult local gardening resources.

Instructions

Top Tip

Pinch back Lobelia plants regularly to encourage bushier growth and more blooms.

How to Water

Water Lobelia regularly to keep the soil moist, especially during hot weather. Ensure the soil drains well to prevent root rot. Water at the base to avoid wetting the foliage.

How to Plant

Plant Lobelia in well-draining soil with full sun or partial shade. Space plants 15-30cm apart to allow airflow. Dig a hole slightly larger than the root ball and gently firm the soil around the roots. Mulch to retain moisture.