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Petrophytum caespitosum

Common name rock spiraea
Family rosaceae
Life cycle perennial (Z5-8)
Flowers white
Size 4"
Light sun-part shade
Cultural notes sharply drained soil, drought-tolerant

Low-growing tufted plant with evergreen blue-green leaves. Bottlebrush-like white flowers appear in summer on low branched spikes. Native to rocky areas in the mountains of the U.S. interior west.

This plant used to grow in our garden, but it slipped away...

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Seed-starting details for this plant

  1. Seed from '10 trade. Baggy 70F (16d; 20%G, 6-13d) - 70F with light (44%G, 3-6d)

Light may be helpful. Seedling development is interesting, with flat leaves emerging before the roots do.

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Last modified: February 26, 2011
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