Green Alder vs Diablo Ninebark - TreeTime.ca

Green Alder vs Diablo Ninebark

Alnus alnobetula subsp. crispa

Physocarpus opulifolius Diablo

COMING SOON

(new stock expected: fall of 2025)

COMING SOON

(new stock expected: fall of 2025)

Green Alder
Diablo Ninebark

Green Alder is a cold hardy, native shrub. It is often planted on infertile sites so it can fix nitrogen from the air and improve the soil quality.

Green Alder is known for its smooth grey bark and attractive shiny green leaves; it is commonly used in reclamation.

Diablo Ninebark is a small, low maintenance, multi-stemmed shrub, that is used to add texture or color to any yard. This plant grows dark purple leaves in the spring and grows slightly faster than Common Ninebark. It features flaky red to brown bark, clusters of white flowers, and long, maple-like leaves. Diablo Ninebark can make a dense and colorful hedge, or it can be an attractive ornamental by itself.

Green Alder Quick Facts

Diablo Ninebark Quick Facts

Zone: 1a
Zone: 3a
Height: 7 m (23 ft)
Height: 2.4 m (8 ft)
Spread: 3 m (10 ft)
Spread: 1.8 m (6 ft)
Light: any
Light: partial shade, full sun
Moisture: any
Moisture: dry, normal
Growth rate: fast
Growth rate: fast
Life span: short
Life span: short
Suckering: high
Suckering: low
Maintenance: medium


Foliage: reddish-purple
Fall colour: yellow
Bark: brown to red, exfoliating
Flowers: white
Berries: red
Seeds: inflated seed capsules
Hybrid: no
Hybrid: no
Catkins: yes
Catkins: no

In row spacing: 0.9 m (3 ft)

Between row spacing: 5 m (16 ft)
Other Names: mountain alder, sitka alder
Other Names: eastern ninebark, purple ninebark