Agastache 'Blackadder'
hyssop (syn. Black Adder)
- 9cm pot
- £6.99
- In stock (shipped within 2-3 working days)
- 3 × 9cm pots
- £14.79 £20.97
- In stock (shipped within 2-3 working days)
- 6 × 9cm pots
- £27.00 £41.94
- In stock (shipped within 2-3 working days)
- 2 litre pot
- £16.79
- In stock (shipped within 2-3 working days)
- 3 × 2 litre pots
- £39.99 £50.37
- In stock (shipped within 2-3 working days)
Delivery options
- Standard £5.95
- Position: full sun
- Soil: moderately fertile, moist but well-drained soil
- Rate of growth: average
- Flowering period: July to October
- Hardiness: borderline hardy (may need winter protection)
Hyssops are great for adding height to a border, with whorls of long-lasting, tiny flowers arranged like a bottlebrush, and pointed, aromatic fresh green leaves that are attractive to butterflies. They are short-lived though, and may need replacing every few years, especially after a cold or wet winter. 'Blackadder' has smoky, violet flowers on long spires from July to October. Try it as part of a Mediterranean scheme or in a sunny, well-drained border among ornamental grasses.
Plant in a well-prepared bed, lightly conditioned with well-rotted compost or manure. Keep cutting the old stems out to encourage repeat flowers through the summer. Once the flowering period is over, resist the temptation to cut back the faded flower-stems until early spring, as they provide interest in the winter months. Once established, lift and divide congested clumps in spring. Protect roots during the winter with a thick layer of organic mulch around the root zone.
Goes well with
Cosmos atrosanguineus Chocamocha ('Thomocha') (PBR)
9cm pot
£7.99
In stock (shipped within 2-3 working days)