2026 Availability- Expected pickup date is late May to early June
Gray or Thinleaf Alder (Alnus incana) is a native large shrub or tree that brings both beauty and ecological function to moist landscape areas. Its soft green leaves and smooth gray bark create a cool, natural texture along streamsides, rain gardens, and low spots where water may pool and other plants struggle. In early spring, dangling catkins add subtle seasonal interest before foliage emerges, while the plant’s dense branching provides shelter and nesting habitat for birds and beneficial insects. Like other alders, Alnus incana forms a partnership with soil microbes that fix atmospheric nitrogen, naturally enriching the soil and helping surrounding plants thrive. Fast-growing and resilient, Thinleaf Alder is an excellent choice for restoration plantings, riparian buffers, rain gardens, wet beds or borders, or naturalistic gardens where its relaxed form can shine. Thinleaf Alder has low drought tolerance and is only suitable for wet sites.
Photo Credit: Nikanos
Gray Alder/Thinleaf Alder
Irrigation Requirement: High
Mature Size: 15-25' tall and wide
Hardiness Zone: 2 - 6
Light Requirement: Full Sun or Partial Shade
Deer Resistant: Somewhat. Deer will browse it, but it is fast growing and as long as its protected during initial establishment it will not hurt the plant.
Salt Tolerant: Yes
Soils: Highly adaptable to sandy, loam, or clay soils.
Plants in the Alnus genus are known host plants for 124 pollinators in northern Utah. Alders are also excellent habitat for birds and small animals. Alders will also improve the soil for surrounding plants by fixing atmospheric nitrogen.