Herbaceous plants (in botanical use frequently simply herbs) are plants that have no persistent woody stem above ground. The term is mainly applied to perennials, but in botany it may also refer to annuals or biennials, and include both forbs and graminoids.

Annual herbaceous plants die completely at the end of the growing season or when they have flowered and fruited, and they then grow again from seed.

Herbaceous perennial and biennial plants may have stems that die at the end of the growing season, but parts of the plant survive under or close to the ground from season to season.

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Echinops bann. Blue Globe

Often grown as an architectural plant for its shapely leaves, the dark blue flowerheads in summer will attract many butterflies and bees to your border, Height 100 cm. Spread 45 cm.

Eryngium bourgatii

The silver veined dark green foliage is very impressive when it reappears. The stiff steely blue flowerstems and flowers add to its magic in summer. Height 60 cm. Spread 40 cm.

Geranium Rozanne

The violet-blue flowers have white centres and appear from late spring to November. Rewarding plant, rich flowering and a strong grower. Height 45 cm. Spread 50 cm.

Nepeta subsessilis

Large blue flowers from June-August. Sunny position, free-draining soil. Height 60 cm.

Nepeta Walkers Low

Aromatic grey-green foliage. Dark lavender-blue flowers come in flushes from early Summer. Will continue to Autumn once deadheaded. Height 60cm. Spread 80cm. Drought tolerant.

Nepeta x. faassenii

Bushy, clump-forming. Useful for edging. Loose spikes of soft lavender-blue flowers in July-Aug. Height 45 cm. Position in full sunlight and in well drained soil.

Polemonium cae Bambino Blue

Height 40 cm. Hardy herbaceous perennial. Blue flowers June-July. Sunny position, any free-draining soil.

Salvia nemerosa Caradonna

Violet-blue flower spikes from June to October. Grey-green scented foliage. A magnet for bees and butterflies. Height 30cm. Spread 45cm.

Stokesia Mels Blue

Masses of stunning lilac blue flowers nestled in bright green foliage from late Summer through to Autumn. Attracts bees & butterflies. Plant in full sun or part shade. Height 40 cm. Spread 30 cm.