Equisetum hyemale – scouring rush – Equisetaceae
Notes/Site: Rush/Sedge. From Eurasia, North America. Zone 4-9. Up to four feet in height and six feet spread. Non flowering. Full sun to part shade. Medium to wet soil. Water plant, naturalize, rain garden. Tolerant of heavy shade and a range of soils. Will grow in 4″ of standing water. Spreads to form large colonies in the wild. Aggressive and will spread by creeping rhizomes. Definitely needs a soil barrier or something to constrict the spreading. They are categorized as a fern because it is non flowering and produces spores.
Aesthetic/Notes: It is strikingly different from many plants, thus it is an interesting feature in a garden or landscape. The fact it can be colonizing and contained along with it’s dense form, can create a continuous massing form. It needs fairly wet soil. I am not a fan of heavily irrigated landscapes, so I would place this plant low on the watertable level, where water will drain towards it in a contained rain garden/pond.
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