🏛️ Columbia London Planetree

Platanus × acerifolia ‘Columbia’
The pyramidal planetree: a tougher, mildew- and anthracnose-resistant selection with deeply lobed leaves that heals pruning wounds well.
Sun
Full sun to partial shade
Mature size
About 50 ft tall, 40–50 ft wide; pyramidal form
Spacing
50–60 ft from other large trees and structures
Soil pH
Wide tolerance (about 3.7–8.2); prefers moist, well-drained soil
Zones
Zones 5–8 (some lists to 9); North Florida at best, marginal in Florida

What it looks like

Columbia London Planetree (Platanus ×) — Heritage Acres, Saanichton, British Columbia, Canada, 2018
Heritage Acres, Saanichton, British Columbia, Canada, 2018. Photo: Thomas Quine, CC BY 2.0.
Platanus × (species) — Platanes en alignement urbain
Platanus ×, the species (no verified photo of ‘Columbia’ itself exists). Photo: Taken by Fanghong, CC BY-SA 3.0.

Why this variety

Columbia is the London planetree for gardeners who want the hybrid’s toughness with a tidier shape and stronger disease defenses: a pyramidal tree to about 50 feet, with deeply lobed, dark green leaves, mottled peeling bark, and resistance to both anthracnose and powdery mildew that extension writers rate above Bloodgood’s. It also tolerates heavy pruning and heals wounds well, which matters on a tree that will be pruned around streets, wires, and buildings for decades — a planetree that closes its wounds quickly is a planetree that stays sound longer.

At 50 feet Columbia is still a very large tree, just a more disciplined one than the 70- to 100-foot species at its most ambitious — plant it with the same respect for roots, sidewalks, and crown spread, and it will repay the site with fast shade and winter bark. The Florida caution is unchanged: a temperate-zone tree, marginal even in North Florida, where heat, humidity, and disease pressure blunt the very resistances Columbia was selected for. In its proper climate, though, it is arguably the best-behaved large planetree you can plant.

If you have not met the species yet, start with the London Planetree guide for the whole hybrid, then come back here for Columbia in detail.

How to grow

Plant Columbia in spring or fall in full sun in moist, well-drained soil — it tolerates a wide range of soils and pH — with 50 to 60 feet of clearance. Water deeply until established, mulch widely, and prune in late fall or winter; Columbia’s good wound healing makes it the planetree to choose where pruning will be frequent, but even a good healer prefers a clean cut at the right season to a ragged cut at the wrong one. Train a strong central leader while young for the pyramidal form to develop properly.

Water & feeding

Water deeply until established and through droughts; Columbia is tough once established but grows best with steady moisture, and a well-watered tree resists mildew and anthracnose better than a stressed one. Compost at planting and mulch do more than heavy fertilizer on a tree of this size and vigor.

Common problems

  • Anthracnose and mildew in wet, humid years — resisted better than most planetrees, not eliminated; airflow and leaf cleanup help.
  • Canker stain, lace bug, and frost cracking — the usual planetree watch list; vigorous trees outgrow most of it.
  • Size and roots — a 50-foot pyramidal tree still heaves walks and drops fruit balls; site accordingly.
  • Over-pruning enthusiasm — Columbia tolerates heavy pruning, which is not a dare to do it every year for fun.

Harvest

The harvest is a disciplined giant: pyramidal shade, deeply lobed leaves, camouflage bark, and a tree that takes street life — pruning, pollution, compaction — and keeps its shape. Columbia is the planetree for the avenue that must look intentional, not accidental.

Nerdy fact: A pyramidal tree shape is not just pretty — it is structural: a central leader with branches shortening toward the top sheds wind and snow loads more evenly than a spreading crown, which is one reason pyramidal selections like Columbia hold up so well as street trees. Form follows physics, and physics favors a pyramid.

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Saving seeds

Columbia is a named London planetree cultivar — buy a nursery tree; seedlings won’t hold the pyramidal shape or the disease resistance. The Propagation section of the London Planetree guide covers how the species is propagated.