Description
LAVANDULA × intermedia ‘Seal’ or Lavender ‘Seal’ is a traditional and highly regarded hybrid lavender known for its vigorous growth, strong fragrance, and soft lilac‑violet flower spikes. This cultivar has been grown for decades in both ornamental and commercial settings, valued for its reliability, uniform habit, and generous flowering performance. Its tall stems and airy flower spikes create movement and structure in borders, while its aromatic foliage provides year‑round interest.
Key Features:
Propagation method: Vegetative soft-wood cuttings.
Substrate: Jiffy peat-free propagation Mix.
Plug Size: 4.5cm.
Production system: Grown without artificial light or heating for hardened plants.
Flowers: Soft lilac‑violet spikes held high above the foliage.
Foliage: Narrow, aromatic, silver‑grey leaves with a classic hybrid lavender scent.
Flowering period: Mid‑summer to early autumn (usually June–September).
Height: Up-to 90cm at maturity.
Spread: Up-to 90cm at maturity.
Hardiness: Hardy in most UK regions.
Pollinator value: Highly attractive to bees and beneficial insects.
Sensory value: Ideal for SEND gardens and therapeutic planting schemes.
Ecological impact: Grown in peat-free substrate with no artificial inputs, pollinator and wildlife-friendly.
Awards: Included in RHS lists of pollinator-friendly plants; selected for ecological value.
Planting & Care:
Prefers full sun and well-drained, slightly alkaline soils.
Drought-tolerant once established.
Prune lightly after flowering to maintain shape and encourage bushiness.
Ideal for containers, lavender avenues, cottage‑style borders, and Pollinator/Wildlife-friendly planting schemes.
Commercial Notes:
LAVANDULA × intermedia ‘Seal’ are supplied as strong, well-rooted, hardy plug plants ready for potting into pots up-to 2lt formats.
Ideal for nursery, and wholesale formats and performs well in peat-free and organic programs.
Suitable for wildlife-friendly, sensory, and sustainable product ranges.
Plant Profile from Royal Horticultural Society:
Lavandula plants are not subject to VAT.
