Herbaceous perennial with bright green, aniseed-scented leaves. From early summer through to autumn, spikes of purple-blue flowers, protrude from dark pink calyces, creating a strong flowering effect above the foliage.
Agastache 'Blue Boa'
Giant hyssop
Details
| Aspect | Full sun |
| Flower Colour | Blue | Purple |
| Flowering Period | Jul | Aug | Sep |
| Foliage | Not evergreen |
| Goes Well With | Echinacea, Geranium, Rudbeckia |
| Growth Habit | Clump-forming |
| Hardiness | Fully hardy |
| Height | 70cm |
| Soil | Rich and fertile |
| Spread | 30cm |
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