Spikes of lilac-blue flowers July-Sept. Fresh green peppermint-scented leaves. Ht 70cm. Perennial for a sunny well-drained site
Large dark violet-blue spikes on dark coloured stems July-Oct. Fragrant foliage. Ht 90cm. Perennial for a sunny well-drained site
Spikes of deep blue flowers July-Oct above a mound of deep green foliage. Attractive to bees. Ht 50cm. Perennial for sunny well-drained site
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