Agastache 'Black Adder'
Agastache 'Black Adder' is a striking, upright perennial producing tall, dense flower spikes packed with fragrant red-violet tubular blooms. Emerging from dark buds, the flowers create dramatic contrast above aromatic green foliage and bring strong vertical interest to summer planting schemes.
Flowering over a long season from midsummer into autumn, 'Black Adder' is highly attractive to bees, butterflies and other pollinating insects. Its scented foliage can develop deeper tones in cooler conditions, extending the plant's ornamental appeal beyond the main flowering period.
Fast growing and naturally well branched, this reliable variety quickly forms multiple crowns and shows good mildew tolerance. It is ideal for sunny borders, prairie-style planting and large containers, performing best in fertile, well-drained soil.
- Dense spikes of fragrant red-violet tubular flowers
- Dark buds provide strong contrast
- Long flowering season from midsummer into autumn
- Aromatic foliage with good mildew tolerance
- Strong, upright and well-branched habit
- Ideal for sunny borders, prairie planting and containers
- Highly attractive to bees, butterflies and other pollinators
- Height 60cm - Spread 40cm
Giant Hyssop
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EAN code8719323275683
- Pot Size2L (17cm)
- AspectSouth-facing, West-facing
- Attractive to WildlifeAttractive to Bees, Attractive to Butterflies & Moths
- Flower ColourBlue, Purple
- Flowering MonthJuly, August, September, October
- Foliage ColourGreen
- Foliage TypeDeciduous
- Garden StyleCity & Courtyard Garden, Cottage & Informal Garden, Gravel Garden, Patio & Container, Prairie Planting, Wildlife Garden
- Hardiness - RHS ratingH4 -10 to -5c. Hardy - average winter
- Height60cm
- Spread40cm
- MoistureMoist but well-drained, Well-drained
- pHAcid, Alkaline, Neutral
- Plant HabitBushy, Columnar / Upright
- Plant TypePerennial
- Planting TypesBorders and Beds, Pots & Containers
- Season of InterestSummer, Autumn
- Soil TypeChalk, Loam, Sand
- Special AttributesDrought Tolerant, Easy to Grow, Long Flowering, Low Maintenance, Scented Foliage, Some Resistance to Rabbits & Deer
- SunlightFull Sun
The majority of our national delivery options fall under the categories below. Certain oversized or age restricted items carry an additional delivery charge, however this will be clearly displayed in your basket before checkout.
Tracked Delivery (Express) - £7.99
Zone 1 - England, Wales & Scotland (excluding Highlands & Islands)
- Orders are dispatched within 3-5 working days
- Parcels are sent via DX or DPD on a next day service, requiring a signature on delivery or safe place instructions
- Fully tracked from door to door with text or email notifications along the way to keep you informed
- 2 hour time slot notification
- Dispatch days Monday - Thursday (excluding Bank Holidays)
- Delivery days Tuesday - Friday
Tracked Delivery (2-4 Days) - £14.99
Zone 2 – Highlands & Islands of Scotland
- Parcels are sent via a tracked 48 service, requiring a signature on delivery or safe place instructions
- Tracking code provided on dispatch. Email or SMS notification on day of delivery
- Orders dispatched within two working days
- Please expect 2-4 days for delivery
- List of applicable postcodes
Tracked Delivery (3-4 Days) - £14.99
Zone 3 – Isle of Man, Isle of Wight & Isles of Scilly
- Parcels are sent via a tracked 48 service, requiring a signature on delivery or safe place instructions
- Tracking code provided on dispatch. Email or SMS notification on day of delivery
- Orders dispatched within two working days
- Please expect 3-4 days for delivery
Parcel Tracking
Your order will be sent using a fully tracked service, providing us with some information on the parcel's status, location and route. It also allows us to provide you with the same information. Once your order has been dispatched you will receive an email (please check spam/junk email folders) with a tracking code and instructions on how this information can be retrieved.
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