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Agapanthus ‘Blue Thunder’
(African Lily)


Out of stock


Out of stock


Out of stock

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June - August
120cm x 100cm
Attracts Wildlife
Half Hardy

Agapanthus ‘Blue Thunder’ is a distinguished choice in our range for its captivating large, vibrant blue flowers. Chosen by our team for its hardiness and versatility, this perennial effortlessly enhances garden borders, containers, and mixed plantings. A low-maintenance perennial, ‘Blue Thunder’ aligns with our commitment to providing resilient, visually striking plants that thrive in diverse garden settings.

Additional information

Plant Type
Flower Colour
Flowering Period
Fully Grown Size
Garden Position
RHS Plants For Pollinators
RHS Garden Merit Award
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Agapanthus 'Blue Thunder' is a herbaceous, evergreen Agapanthus that is more compact than other varieties, growing to around half a meter in height. It produces a mound of light green foliage, with long thin evergreen leaves, and long stems rising up to large blooming flower heads bearing globes of deep blue flowers. The flowers themselves possess dark blue stripes down the middle of the inner petals that give this variety an intriguing look up close. Varieties like this one, due to their size, are perfect for potting up and placing on a patio or porch, and they will grow well as such provided they have plenty of sunlight! Agapanthus in general are great plants for low maintenance gardens as they don't require much water, meaning they can put up impressive displays of lots of flower spikes without much effort! Overall, Agapanthus 'Blue Thunder' is a fantastic plant for any garden, be it that you need something to plant up in your bed or border, or maybe you're looking for something to fill a pot - This variety has you covered.

Planting Conditions

For optimal growth of Agapanthus 'Blue Thunder' plant in moist, well-drained soil consisting of sand, loam, clay, or chalk. The plant is versatile regarding soil ph. Choose a sheltered location with at least six hours of sunlight daily. Whether in pots or flower beds, ensure the soil doesn't become waterlogged. When planting in containers, the restricted root growth enhances performance. Water well during dry periods and avoid waterlogging. This adaptable Agapanthus variety establishes well in various conditions, rewarding your garden with its striking foliage and vibrant blooms.

Watering & Feeding

Agapanthus 'Blue Thunder' benefits from regular watering during dry spells, maintaining soil moisture without waterlogging. For potted plants, ensure consistent but not excessive watering. During the growing season, feed every 4-6 weeks with a balanced, water-soluble fertiliser to support healthy growth and flowering. Adjust watering frequency based on weather conditions, allowing the soil to dry between waterings. This approach helps prevent root rot and encourages the plant's resilience. With attentive watering and modest feeding, 'Blue Thunder' thrives, showcasing its elegant blooms and contributing to a vibrant garden display.

General Care

Agapanthus 'Blue Thunder' demands minimal care for a vibrant display. Little water, disease resistance, and a lack of extensive pest issues simplify maintenance. Shield from frost in Winter, especially if outdoors. When planting, dig a hole twice the pot's size, fill with compost, and mulch with a 3-inch layer. Ensure the soil stays moist during establishment. Prune dead foliage at ground level, promoting new growth. With its low-maintenance nature, 'Blue Thunder' proves an excellent choice for gardens, providing elegance without the need for intensive care or attention.