A White-Edged Upright Grass with Soft Pink-Tinged Variegation

Overdam Feather Reed Grass (Calamagrostis × acutiflora 'Overdam') is the white-edged version of the classic 'Karl Foerster' — narrow green blades trimmed in creamy white that take on a soft pink blush in cool weather. It keeps the same tidy, upright form and tall summer plumes that stand through a Minnesota winter. Whether you're brightening a border in Eden Prairie, screening a patio in Woodbury, or adding a refined vertical accent in Maple Grove — Overdam delivers cool-toned structure to zone 4b–5a yards.

Overdam Feather Reed Grass Plant Details

Overdam Feather Reed Grass Uses in Minnesota Landscapes

Refined vertical accent and screening

The white-edged blades soften the strong upright form, making Overdam a more delicate accent than solid-green grasses. Use single clumps as accents or a row 18–24 inches apart for an airy, bright seasonal screen.

Four-season winter structure

Through Minnesota's long winter, the golden plumes and stiff stems add height and movement above the snow. Leave them standing until late winter, then cut back.

Tough sites: boulevards and clay

Feather reed grass shrugs off road salt, heavy clay, and reflected heat, so Overdam works on a boulevard strip or a hot, hard-to-plant spot in Bloomington or St. Paul where its bright variegation stands out.

Best Time to Plant Overdam Feather Reed Grass in Minnesota

Spring (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).

Plant a bit earlier in fall than you would a shrub — grasses establish best with several weeks of warm soil ahead of them.

Avoid planting after mid-October or before late April — frozen ground or frost-heaving kills new roots.

How to Plant Overdam Feather Reed Grass

1. Dig wide, not deep. 2–3× the root ball width, same depth as the container.
2. Loosen heavy clay around the hole, but feather reed grass tolerates clay better than most — no heavy amendment needed.
3. Backfill with native soil mixed with some compost; firm gently and water in well.
4. Space plants 18–24 inches apart for a row or screen; give single accents room to show their full form.
5. Build a shallow water basin the first season, then flatten it before winter.
6. Mulch 2 inches with shredded bark, kept off the crown. Cut the clump back to 4–6 inches in late winter before new growth emerges.

Watering Overdam Feather Reed Grass in Minnesota

First Year Watering Schedule

• Weeks 1–2: Every 2–3 days, deep and slow (15–25 minutes per plant)
• Month 1–2: Every 4–5 days
• Month 3–6: Every 5–7 days during active growth; less if rainfall is adequate
• Stop watering 2–3 weeks before ground freeze (typically late October in the Twin Cities metro).

After Year One

Established 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.

Will Overdam survive a Minnesota winter?

Yes — it's reliably hardy to zone 4 and the dried plumes are a winter feature, standing up through snow. Leave them in place and cut the clump back to a few inches in late winter or early spring.

Is it invasive or will it spread?

No. Feather reed grass forms a tidy clump and the acutiflora hybrids are sterile, so they don't self-sow or run — a well-behaved choice unlike some spreading grasses.

How much sun does it need?

Full sun gives the tightest upright habit, but Overdam takes a bit more shade than solid-green grasses, and a touch of afternoon shade keeps the white variegation crisp.

When do I cut it back?

Late 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.

You May Also Like

• Shop the full Three Timbers Minnesota catalog — zone 4-hardy plants hand-selected for Twin Cities yards
• Full Sun Plants — for hot, bright borders and tough boulevard strips
• Deer-Resistant Plants — for high-pressure suburbs like Minnetonka, Wayzata, and Eden Prairie

How Many Overdam Feather Reed Grass Do I Need?

Overdam forms a tidy 18–24 in. clump, so space plants about 20 in. apart for an airy, bright seasonal screen, or use single clumps as upright vertical accents.

Overdam Feather Reed Grass Season-by-Season in Minnesota

• Spring: White-edged green blades emerge and take on a soft pink blush in the cool spring air.
• Summer: Feathery, pink-tinged plumes rise to 3–4 ft. in early-to-mid summer above the crisp variegated foliage.
• Fall: Plumes age to wheat-gold and the foliage turns golden tan.
• Winter: The stiff plumes and stems stand up through snow, adding height and movement to the winter garden.

At a Glance

✔ Deer-Resistant   ✔ Salt-Tolerant   ✔ Drought-Tolerant   ✔ Four-Season Interest

Plant It With

• Little Bluestem — pairs grass-with-grass for a prairie-style sweep with blue-then-russet color.
• Sombrero Granada Gold Coneflower — gold daisies pop against the bright variegated blades.
• Autumn Fire Sedum — rusty late-season flower heads echo the grass's golden tones.
• Moonshine Yarrow — flat yellow heads and silver foliage complete a tough, sunny, low-water combo.

Is Overdam Feather Reed Grass Right for Your Yard?

Overdam takes full sun to a little afternoon shade, tolerates heavy clay, road salt, and reflected heat, and stays put as a sterile, non-spreading clump — ideal for boulevards and hot strips. Not a fit for deep shade or constantly soggy ground, where the habit loosens and the variegation loses its crispness.