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Plant Calculator

Enter the approximate length and width of the area you will be planting and click 'Calculate' to determine how many Agastache 'Black Adder' you will need.

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Our general spacing recommendation will be shown below, but correct and successful spacing is complex and depends on project conditions. We encourage you to call us at 877-ECO-PLUG for project specific recommendations and further assistance.

Agastache 'Black Adder'

hyssop

The second fantastic Agastache given to us by Coen Jansen, 'Black Adder' boasts numerous bottlebrush flowers of vivid blue from mid summer to frost on a compact, rounded plant. It has been hardy for us in the ground and in containers and has proven to be a reliable production plant as well. An early pinch keeps it more compact in pots.

SIZE
Agastache 'Black Adder' - 72 per flat	Availability

Height 2-3 Feet

Spread 2-3 Feet

Spacing 12-15 Inches

Bloom Color Violet

USDA Hardiness Zone 6-10

Good Substitutions

Agastache 'Blue Fortune'

Agastache 'Golden Jubilee'

Agastache 'Purple Haze'

Agastache 'Blue Boa'

Key Characteristics & Attributes

Full Sun

Dry

Average

Summer

Pollinator-friendly

Hummingbird-friendly

Deer Resistant

Drought Tolerant

Fragrant

Cut Flower

Additional Information