The Ultra-Hardy Columnar Tree for Fast, Narrow Privacy

Swedish Columnar Aspen (Populus tremula 'Erecta') is a tightly upright, fastigiate aspen prized for one of the narrowest profiles of any fast-growing tree — a soaring 40 to 50 feet tall but just 8 to 12 feet wide. Hardy all the way to zone 2 and grown from a non-suckering, seedless male clone, it sidesteps the two biggest problems with wild aspen while delivering the same shimmering, flutter-leaf foliage and silvery bark. Whether you're screening a property line in Blaine, lining a boulevard in St. Paul, or squeezing fast height into a narrow Plymouth side yard, Swedish Columnar Aspen is built for tight spaces and brutal Minnesota winters.

Swedish Columnar Aspen Plant Details

Swedish Columnar Aspen Uses in Minnesota Landscapes

Fast, Narrow Privacy Screens

This is the go-to tree when you need height fast but have almost no width to spare. At 8–12 feet wide, a row planted 6–8 feet apart forms a tall, dense living wall in just a few seasons — ideal for blocking a neighboring rooftop or screening a tight property line in close-set suburbs like Richfield or St. Louis Park.

Boulevards and Formal Vertical Accents

The clean, telephone-pole-straight column suits formal designs beautifully. Use a single tree as a vertical exclamation point, flank an entry or driveway with a matched pair, or line a boulevard for a crisp, repeating rhythm that still flutters and shimmers in the wind.

Tough Sites and Cold Exposure

Hardy to roughly -50°F, Swedish Columnar shrugs off exposure that stresses lesser trees, making it a dependable pick for windswept rural-edge lots and the coldest outer-ring suburbs. Because it's a non-suckering, seedless clone, it stays put instead of colonizing the yard like wild aspen.

Best Time to Plant Swedish Columnar Aspen in Minnesota

Aspen are deciduous, so you have two good planting windows in the Twin Cities:

Spring (late April–May), once the ground has thawed, is excellent — the tree gets the full growing season to establish before its first winter.

Fall (September–mid-October) also works well. Plant at least six weeks before the ground freezes so roots can settle in. Avoid mid-summer planting when transplant stress is highest, and never plant into frozen ground.

How to Plant Swedish Columnar Aspen

1. Dig wide, not deep — the hole should be 2–3 times the root ball width but only as deep as the ball itself. In heavy clay, dig even wider.
2. Check drainage — if water pools in the hole, break through any clay hardpan or mound-plant slightly to keep roots out of standing water.
3. Backfill with the native soil mixed with 20–30% compost. Don't create a pure-compost "container" in clay.
4. Set the tree so the top of the root ball sits at or just above grade. Space trees 6–8 feet apart for a narrow privacy screen.
5. Build a 3–4 inch water basin around the root zone to direct water to the roots; flatten it before winter to prevent ice damage.
6. Mulch with 2–3 inches of shredded bark or wood chips, kept 2 inches away from the trunk. Wrap the lower trunk the first couple of winters to deter rabbit and deer browsing.

Watering Swedish Columnar Aspen in Minnesota

First Year Watering Schedule

Weeks 1–2: water every 1–2 days, deep and slow. Month 1–2: every 3–4 days. Month 3 through fall: every 5–7 days during active growth, less when rainfall is adequate (Minnesota averages about 3 inches per month June–August). Stop watering 2–3 weeks before the ground freezes in late October so the tree can harden off for winter.

After Year One

Established Swedish Columnar Aspen needs supplemental water mainly during extended dry spells (2+ weeks with no rain). Water deeply and infrequently — soaking to 6–8 inches every 7–14 days during drought — and let natural rainfall do most of the work.

Will Swedish Columnar Aspen survive a Minnesota winter? Without question — it's hardy to about -50°F, colder than anywhere in the state gets. It's one of the toughest trees you can plant here.

Does it sucker like wild aspen? No. Swedish Columnar is a seedless, non-suckering male clone, so it stays as a single tidy column instead of sending up shoots across the yard — a major advantage over native quaking aspen.

How narrow does it really stay? Just 8–12 feet wide at a full 40–50 feet tall, giving you one of the tightest profiles of any fast-growing tree — perfect for narrow screens and boulevards.

Is it native to Minnesota? No — it's the European aspen (Populus tremula), not our native quaking aspen. It has been a reliable, well-mannered landscape tree in cold climates for decades. If you specifically want a native, consider Summer Shimmer or Mountain Sentinel Aspen instead.

You May Also Like

• Mountain Sentinel Aspen — a native columnar quaking aspen for tight spaces and slim screens.
• Summer Shimmer Aspen — an improved native aspen with a fuller spread and reduced suckering.
• Princeton Sentry Ginkgo — a narrow, columnar shade tree with golden fall color for tight spaces.
• Parkland Pillar Birch — a slim columnar white-bark birch for narrow vertical accents.

How Many Swedish Columnar Aspen Do I Need?

For a fast, narrow privacy screen, space Swedish Columnar Aspen 6–8 feet apart (about 7 feet on center works well in most Twin Cities yards):

For a formal boulevard or driveway line, stretch spacing to 10–12 feet for distinct, repeating columns. A single tree also works beautifully as a stand-alone vertical accent.

Swedish Columnar Aspen Season-by-Season in Minnesota

• Spring: Soft catkins appear before the small rounded leaves emerge a fresh bright green; as a seedless male clone there's no cottony fluff or seedlings to clean up.
• Summer: The signature aspen shimmer — thousands of flat-stemmed leaves fluttering in every breeze on a tight, telephone-pole-straight column, adding 2–3 feet of height per year.
• Fall: Foliage turns a clear, glowing yellow that reads from down the block, among the most reliable gold fall color of any columnar tree.
• Winter: The smooth, silvery-gray bark and bolt-upright silhouette stand out against snow, and the zone-2 hardiness means zero winter dieback worry.

At a Glance

✔ Four-Season Interest

Plant It With

• Mountain Sentinel Aspen — the native columnar quaking aspen alternative; mix the two for a varied but uniform-looking slim screen.
• Summer Shimmer Aspen — an improved native aspen with a fuller crown to anchor the end of a columnar row.
• Princeton Sentry Ginkgo — another narrow vertical with matching gold fall color and bulletproof constitution.
• Quaking Aspen — Minnesota's iconic native; pair a grove with a columnar row for a layered northwoods look.

Is Swedish Columnar Aspen Right for Your Yard?

Choose it if you have full sun, a narrow strip of ground, and you want serious height fast — it thrives in ordinary Twin Cities clay-loam or sandy soil and laughs at the coldest winters. Be honest about the trade-off: like most poplars it's a relatively short-lived tree (figure a few decades, not a century), and young trunks need winter protection from rabbits and deer. Not a fit if you're after a permanent legacy shade tree — plant an oak or ginkgo for that and use this aspen where speed and slimness matter most.