#11) Cedrus atlantica 'Glauca Pendula'

Earlier this year, I saw a landscape design that made me see Weeping Blue Atlas Cedar in a new way. The installation is at Darien and San Benito in San Francisco. Within an angular planting bed (adjacent to lawn), they placed this specimen plant in between low-growing Aloe polyphylla (top image, left) and Agave attenuata 'Ray of Light' (bottom image, right), showing off its unique form.

It fits an interesting use case, where you would want something showy and sculptural, yet low and wide, such as outside a window. Here, it's used in a modern context, with equally as interesting plant forms. What I find particularly interesting is the pairing of this woodsy plant with succulents – who would have thought! But, it really works.

Details:
Biological Name: Cedrus atlantica 'Glauca Pendula'
Common Name: Weeping Blue Atlas Cedar
Family: Pinaceae
Origin: [unknown]
Exposure: Full Sun
Irrigation: Low Water Needs
Flower Time: Does not bloom
Height: 15-20’, slow growing
Width: 15-20’, slow growing

If anyone knows the origin of this plant, or the landscape designer, please let me know. Thanks!

#9) Banksia speciosa

I came across Banksia speciosa at San Francisco Botanical Garden earlier this month. And, I was happy to see it on the Devil Mountain Nursery website, so I'm hoping it is somewhat available. It has gorgeous gray green leaves, with zigzagging serrated edges. At the ends of each branch, in the center of its radiating leaves, this plant produces a cone-shaped flower. Together, the geometries are something to marvel at and from which to derive architectural inspiration, much like Frank Lloyd Wright would have done.

Like the other plants in the Proteaceae family, this plant can get very large (20' h x 15' w), which is much too big for most residential gardens (wouldn't it be great if there were a smaller cultivar??). The irony is that this would make a great freeway screening plant, but I feel its beauty is only fully appreciated close-up.

Mixing things up a bit, this planting scheme is based more on form than color. This could be a part of a mature garden, for the hypothetical 'Banksia House'. A) Banksia speciosa, can be accompanied by other thin leafed plants such as C) Yucca rostrata, and E) Butia capitata, as well as broad leaved plants such as B) Agave celsii var. albicans 'UCB' (seen on San Marcos Growers website),  D) Leucadendron discolor 'Pom Pon', and F) Aloe plicatilis. Assuming the Banksia House is on plenty of land, these plants would look amazing massed together, basking in the hot Southern California sun.

Details:

Biological Name: Banksia speciosa

Common Name: Showy Banksia

Family: Proteaceae (Proteas)

Origin: Australia (Australasia)

Exposure: Full Sun

Irrigation: Low Water Needs

Flower Time: Summer/Fall

Height: 12-20’

Width: 10-15’

#4) Cussonia spicata

I've admired this plant for many years, and have thoughts several times how nice it could look in my garden. I love it's broad gray green leaves, with their complex geometric form.

I assumed it was a small or medium sized shrub, but as it turns out, it's a tree! In its native country (South Africa), it can get incredibly large, branching off into a candelabra shape. I'd imagine that it would take many decades for this to happen. Branches can also fall off older trees, and produce cone-like flower stalks.

For landscape purposes, I've only seen this tree with a single trunk, which doesn't initially appeal to me. But, after giving this a little more thought, A) Cussonia spicata can be used much like a palm tree... in groupings, with trees differing in height/ages. And, one could underplant with other South African plants, such as B) Zamia furfuracea, C) Melianthus major, and D) Aloe ferox. The trees could look especially appealing along both sides of a walk, or against a prominent wall.

Details:
Biological Name: Cussonia spicata
Common Name: Cabbage-tree
Family: Araliaceae (Ginsengs)
Origin: South Africa (Africa)
Exposure: Sun or Shade
Irrigation: Medium Water Needs
Flower Time: Spring/Summer
Height: 25-40’
Width: 15-30’