Content Detail

The EXCLAMATION!™ London planetree is a Chicagoland Grows® introduction that is resistant to anthracnose and frost cracking. It is a large tree with beautiful peeling bark.

  • Family (English) Sycamore, planetree
  • Family (botanic) Platanaceae
  • Planting site City parkway, Residential and parks, Restricted sites, Wide median
  • Tree or plant type Tree
  • Foliage Deciduous (seasonally loses leaves)
  • Native locale Non-native
  • Size range Large tree (more than 40 feet)
  • Mature height 55-65 feet
  • Mature width 40-50 feet
  • Light exposure Full sun (6 hrs direct light daily)
  • Hardiness zones Zone 4, Zone 5 (Northern Illinois), Zone 6 (City of Chicago), Zone 7, Zone 8
  • Soil preference Moist, well-drained soil
  • Tolerances Alkaline soil, clay soil, Dry sites, Road salt, Wet sites
  • Season of interest early winter, midwinter, late winter, early fall
  • Flower color and fragrance Inconspicuous
  • Shape or form Pyramidal
  • Growth rate Fast
  • Transplants well Yes
  • Wildlife Birds, Insect pollinators, Small mammals
  • Has cultivars NA

Native geographic location and habitat:

Of hybrid origin.

Bark color and texture:

The bark is peeling, revealing a mottled pattern of green, tan and brown.

Leaf or needle arrangement, size, shape, and texture:

The alternate leaves are large, 6 to 7 inches long and up to 10 inches wide, and palmately lobed. The medium green leaves change to yellow and brown in fall.

Flower arrangement, shape, and size:

Flowers are monoecious, with separate male and female flowers. Flowers appear in early spring with the leaves as dense globose balls on long stalks (peduncles). Male flowers are green and female flowers are a showier bright burgundy-red. Not ornamentally important.

Fruit, cone, nut, and seed descriptions:

Ball-like seed heads (1 inch diameter)  hang in pairs from long stalks. Seeds shatter during winter months. This cultivar tends to produce less fruit than the species.

Plant care:

Plants grow best in moist, deep, rich well-drained soil in full sun but does not tolerate shady sites.  It is considered soil pH adaptable and moderately salt and drought tolerant. Can be a messy tree since it drops a lot of leaves, twigs, and fruit.

List of pests, diseases, and tolerances:

Possible problems include canker stain and sycamore lace bugs. This tree is resistant to anthracnose, powdery mildew, and frost cracking.


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