{"product_id":"karl-foerster-feather-reed-grass","title":"Karl Foerster Feather Reed Grass","description":"\u003ch1\u003eThe Classic Upright Grass — A Minnesota Garden Workhorse\u003c\/h1\u003e\n\u003cp\u003eKarl Foerster Feather Reed Grass (Calamagrostis × acutiflora 'Karl Foerster') is the gold standard of ornamental grasses — a former Perennial Plant of the Year famous for its strictly vertical form and the earliest plumes of any reed grass. Feathery flower spikes appear in June and ripen to golden wheat that stands tall straight through a Minnesota winter. Whether you're adding height to a border in Eden Prairie, screening a patio in Woodbury, or lining a driveway in Maple Grove — Karl Foerster delivers four-season structure in zone 4b–5a yards.\u003c\/p\u003e\n\u003ch2\u003eKarl Foerster Feather Reed Grass Plant Details\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eAttribute\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eScientific Name\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCalamagrostis × acutiflora 'Karl Foerster'\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCommon Names\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFeather Reed Grass, Karl Foerster Grass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMature Height\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3 feet (foliage); 4–5 feet with plumes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMature Width\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18–24 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGrowth Rate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eModerate to fast — the most vigorous of the reed grasses; tidy clump that does not spread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSun\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFull sun (6+ hours). Tolerates light shade but stands tallest and tightest in full sun.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWater\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAverage. Tolerates short dry spells once established; also handles seasonally moist soil.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUSDA Zones\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3–9 (Twin Cities is zone 4b–5a)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSoil\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVery adaptable — thrives in Minnesota clay-loam and tolerates heavy soils better than most grasses.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFoliage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDeciduous — solid green upright blades; turns golden tan and stands through winter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWinter Hardiness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eReliable to -40°F. One of the hardiest ornamental grasses for Minnesota.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDeer Resistance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStrongly deer-resistant — ornamental grasses are rarely browsed.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBloom\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFeathery pinkish-bronze plumes in early summer (the earliest reed grass), aging to wheat-gold for fall and winter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eKarl Foerster Feather Reed Grass Uses in Minnesota Landscapes\u003c\/h2\u003e\n\u003ch3\u003eVertical accent and screening\u003c\/h3\u003e\n\u003cp\u003eThe narrow, strictly upright form adds 4–5 feet of height in a footprint under 2 feet wide — perfect for tight spots. Use single clumps as accents or a row 18–24 inches apart for a fast, airy seasonal screen along a patio or property line.\u003c\/p\u003e\n\u003ch3\u003eFour-season winter structure\u003c\/h3\u003e\n\u003cp\u003eWhere winter runs five months, the golden plumes and rigid stems give the garden architecture and movement above the snow. Karl Foerster holds its form better than almost any grass — leave it standing until late winter.\u003c\/p\u003e\n\u003ch3\u003eTough sites: boulevards and clay\u003c\/h3\u003e\n\u003cp\u003eIt shrugs off road salt, heavy clay, and reflected heat, making it a reliable choice for a boulevard strip or a hot, hard-to-plant spot in Bloomington or St. Paul. Mass several for a bold, modern look.\u003c\/p\u003e\n\u003ch2\u003eBest Time to Plant Karl Foerster Feather Reed Grass in Minnesota\u003c\/h2\u003e\n\u003cp\u003eSpring (late April–May) and early fall (late August–mid September) are both excellent. Spring planting gives a full season of root growth; early-fall planting still allows 6–8 weeks to establish before ground freeze (typically mid-November in the Twin Cities).\u003c\/p\u003e\n\u003cp\u003ePlant a bit earlier in fall than you would a shrub — grasses establish best with several weeks of warm soil ahead of them.\u003c\/p\u003e\n\u003cp\u003eAvoid planting after mid-October or before late April — frozen ground or frost-heaving kills new roots.\u003c\/p\u003e\n\u003ch2\u003eHow to Plant Karl Foerster Feather Reed Grass\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eDig wide, not deep. 2–3× the root ball width, same depth as the container.\u003c\/li\u003e\n\u003cli\u003eLoosen heavy clay around the hole, but feather reed grass tolerates clay better than most — no heavy amendment needed.\u003c\/li\u003e\n\u003cli\u003eBackfill with native soil mixed with some compost; firm gently and water in well.\u003c\/li\u003e\n\u003cli\u003eSpace plants 18–24 inches apart for a row or screen; give single accents room to show their full form.\u003c\/li\u003e\n\u003cli\u003eBuild a shallow water basin the first season, then flatten it before winter.\u003c\/li\u003e\n\u003cli\u003eMulch 2 inches with shredded bark, kept off the crown. Cut the clump back to 4–6 inches in late winter before new growth emerges.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eWatering Karl Foerster Feather Reed Grass in Minnesota\u003c\/h2\u003e\n\u003ch3\u003eFirst Year Watering Schedule\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWeeks 1–2: Every 2–3 days, deep and slow (15–25 minutes per plant)\u003c\/li\u003e\n\u003cli\u003eMonth 1–2: Every 4–5 days\u003c\/li\u003e\n\u003cli\u003eMonth 3–6: Every 5–7 days during active growth; less if rainfall is adequate\u003c\/li\u003e\n\u003cli\u003eStop watering 2–3 weeks before ground freeze (typically late October in the Twin Cities metro).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAfter Year One\u003c\/h3\u003e\n\u003cp\u003eEstablished clumps are quite drought-tolerant and need water only during extended dry spells. Feather reed grass also tolerates seasonally moist soil, so it's forgiving on both ends. Let natural rainfall do most of the work.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill Karl Foerster survive a Minnesota winter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEasily — it's hardy to zone 3, among the toughest ornamental grasses you can plant, and the dried plumes are a winter feature that stands up through snow. Leave them and cut the clump back to a few inches in late winter or early spring.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it invasive or will it spread?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. Karl Foerster is a sterile hybrid that forms a tidy clump and produces no viable seed, so it never self-sows or runs — one reason it's the most widely planted ornamental grass in cold climates.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow tall does it really get?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe foliage mounds to about 3 feet, and the flower plumes push the total to 4–5 feet by mid-summer — all in a narrow, upright clump under 2 feet wide.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen do I cut it back?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eLate winter to early spring, before new green growth appears — cut the whole clump to 4–6 inches. That's the only real maintenance it needs.\u003c\/p\u003e\n\u003ch2\u003eYou May Also Like\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eShop the full Three Timbers Minnesota catalog — zone 4-hardy plants hand-selected for Twin Cities yards\u003c\/li\u003e\n\u003cli\u003eFull Sun Plants — for hot, bright borders and tough boulevard strips\u003c\/li\u003e\n\u003cli\u003eDeer-Resistant Plants — for high-pressure suburbs like Minnetonka, Wayzata, and Eden Prairie\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- tt-enriched --\u003e\n\u003ch2\u003eHow Many Karl Foerster Feather Reed Grass Do I Need?\u003c\/h2\u003e\n\u003cp\u003eSpace plants 18–24 inches apart for a fast, airy screen or row, or use single clumps as vertical accents. At about 20 inches:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eRun Length\u003c\/th\u003e\n\u003cth\u003ePlants Needed\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 ft\u003c\/td\u003e\n\u003ctd\u003e6 plants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e20 ft\u003c\/td\u003e\n\u003ctd\u003e12 plants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e30 ft\u003c\/td\u003e\n\u003ctd\u003e18 plants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e40 ft\u003c\/td\u003e\n\u003ctd\u003e24 plants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eKarl Foerster Feather Reed Grass Season-by-Season in Minnesota\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring:\u003c\/strong\u003e Solid green, strictly upright blades push up early and fill the clump.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSummer:\u003c\/strong\u003e Feathery pinkish-bronze plumes appear in June — the earliest of any reed grass.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFall:\u003c\/strong\u003e Plumes and stems ripen to wheat-gold, adding warm vertical color.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWinter:\u003c\/strong\u003e Rigid golden stems and plumes stand through snow for true four-season structure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eAt a Glance\u003c\/h2\u003e\n\u003cp\u003e✔ Deer-Resistant   ✔ Salt-Tolerant   ✔ Drought-Tolerant   ✔ Four-Season Interest\u003c\/p\u003e\n\u003ch2\u003ePlant It With\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/little-bluestem\"\u003eLittle Bluestem\u003c\/a\u003e — a shorter native grass for layered texture and blue-to-russet color.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/sombrero-granada-gold-coneflower\"\u003eSombrero Granada Gold Coneflower\u003c\/a\u003e — golden coneflowers that pop against the vertical blades.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/autumn-fire-sedum\"\u003eAutumn Fire Sedum\u003c\/a\u003e — rosy late-season heads that complement the wheat-gold plumes.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/blue-fortune-hyssop\"\u003eBlue Fortune Hyssop\u003c\/a\u003e — airy blue spikes for a soft, pollinator-friendly contrast.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eIs Karl Foerster Feather Reed Grass Right for Your Yard?\u003c\/h3\u003e\n\u003cp\u003eKarl Foerster Feather Reed Grass thrives in full sun and shrugs off clay, road salt, and reflected heat — a workhorse for boulevards, screens, and tough sites. Not a fit for deep shade, where the upright form loosens, flops, and produces fewer plumes.\u003c\/p\u003e","brand":"Three Timbers Minnesota","offers":[{"title":"#5 Gallon","offer_id":54233663471921,"sku":null,"price":27.99,"currency_code":"USD","in_stock":true},{"title":"#2 Gallon","offer_id":54230599303473,"sku":null,"price":20.99,"currency_code":"USD","in_stock":true},{"title":"#1 Gallon","offer_id":54233663504689,"sku":null,"price":10.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0986\/0694\/0465\/files\/Karl_Foerster_Feather_Reed_Grass_2.jpg?v=1779074428","url":"https:\/\/threetimbersmn.com\/products\/karl-foerster-feather-reed-grass","provider":"Three Timbers Minnesota","version":"1.0","type":"link"}