Plant Finder Features How It Works Pricing Testimonials Blog

The UK's leading eCommerce platform for horticulture businesses.

Product

Features
How It Works
Pricing

Company

About
Blog
Contact

Legal

Twitter LinkedIn

giant hyssop 'Blackadder' | Plant Finder | Fill My Garden

Home/Plants/Perennials

Plants > Perennials

giant hyssop 'Blackadder'

Agastache 'Blackadder'

Pollinator FriendlyFragrant

Genus: Agastache
Family: Lamiaceae

About this plant

'Blackadder' is one of the hardiest and most reliably perennial of the genus. Its blue-black spikes of paler-lipped flowers darken in late September and provide winter interest. The aromatic leaves suggest anise

Growing Information

Height

0.5-1 Metres

Spread

0.1-0.5 Metres

Hardiness

Foliage

Deciduous

Growing Conditions

Sunlight

Full Sun

Soil

ClayLoamSandy

AcidAlkalineNeutral

Not Currently Available

This plant is not currently stocked at any garden centres on our platform.

Moisture

Well Drained

Aspect

East FacingWest Facing

Exposure

Exposed

Care Guide

Cultivation

Grow in well-drained fertile soil in full sun. Excellent drainage is especially important during the winter months. It can suffer during cold wet winters

Pruning

Trim back stems in late autumn to reduce windrock. Prune flowered stems back in spring

Propagation

Root semi-ripe cuttings in late summer and overwinter under cover; propagate by division in spring. This cultivar is sterile

Pests

Generally pest free

Diseases

Can suffer from powdery mildews

Garden Uses

Uses

Ground CoverHedging ScreensLow Maintenance

Planting Places

GreenhouseOutdoor

Season of Interest

SpringSummerAutumn

Size & Characteristics

Height

0.5-1 Metres

Spread

0.1-0.5 Metres

Habit

Bushy

Time to Full Height

Five To Ten Years