Alnus rhombifolia
Alnus rhombifoliafam. Betulaceae
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Pl. B965 — Alnus rhombifolia
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IOverview
Overview
Alnus rhombifolia, commonly known as California alder, belongs to the Betulaceae family and is native to regions including California, Idaho, Montana, Oregon, Washington, and parts of Mexico’s northwest. This deciduous tree thrives in moist or wet environments with medium to heavy clay soil, requiring full sun to partial shade for optimal growth. It can reach a height of 12 meters and is known for its edible value, as both the flowers and inner bark are consumable. Its distinctive feature lies in its ability to adapt to various environmental conditions while providing sustenance through its parts.
Quick answers
What is Alnus rhombifolia?
Alnus rhombifolia, commonly known as California alder, belongs to the Betulaceae family and is native to regions including California, Idaho, Montana, Oregon, Washington, and parts of Mexico’s northwest.
Growingconditions · propagation · uses
VCultivation
Cultivation
Alnus rhombifolia thrives in full to partial sun and requires moist to wet soil, preferring medium to heavy (clay) types. It is hardy in zones 8-11 and can grow up to 12 meters tall. For cultivation, ensure the plant receives adequate moisture; it grows best where water is readily available. Propagate via seeds or cuttings from inner bark and flowers.
Light
Full sun, Partial sun/shade
Water
Moist, Wet
Soil
Medium, Heavy (clay)
Hardiness
8-11
Mature size
12.0 m tall
For first-time growers
How to grow Alnus rhombifolia for the first time
8steps
Start with planting Skip in a suitable location to ensure its success.
- 1
What you'll need
Skip saplings, garden gloves, spade or shovel.
- 2
Best time to plant
Plant Skip in spring or fall when the weather is cooler.
- 3
Soil and container prep
Ensure soil is moist, well-draining but not too sandy. Amend with compost if needed.
- 4
Sowing or transplanting
Transplant Skip saplings in a hole twice as wide and just as deep as the root ball.
- 5
First two weeks
Water regularly to keep soil moist, but not waterlogged. Monitor for signs of stress.
- 6
Ongoing care
Provide full sun to partial shade. Water when dry, especially in summer. Prune lightly to remove dead or crossing branches.
- 7
Harvest or pruning
Prune Skip annually in late winter before new growth starts.
- 8
Common mistakes
Overwatering, planting in poor soil, not providing enough light, and neglecting regular pruning.
VIEdible & utility
Edible & utility
Edible parts:FlowersInner bark
Edible uses: The flowers and inner bark of Alnus rhombifolia are edible. The flowers can be eaten raw or used to make a light tea. The inner bark is typically prepared by peeling it from the tree and then either dried for later use or consumed fresh in small quantities.
Other uses:Baby careWeaving materialDyeFire starterTanninLumberNitrogen fixer
Contextrange · companions · related
VIIDistribution
6 native · 0 introduced
Distribution
6 native · 0 introducedDistribution across0 continents· 6 native
Broader regions
native:California, Idaho, Mexico Northwest, Montana, Oregon, Washington
IXSpecimen gallery
1 image
Specimen gallery
1 imageXSee also
7 related
See also
7 relatedPlants you might compare or use together — scored by shared family (Betulaceae), common use cases, and growing requirements.
same family · Betulaceae
Botanical relatives — often share phytochemistry + growing needs.
XI
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Companion planting
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Growing zone
XII
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