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Camperdown Elm Tree Care
Camperdown Elm Tree Care. The Camperdown elm (Ulmus glabra 'Camperdownii') is a rare elm tree cultivar that cannot be grown from seed. The tree was originally discovered in the mid 1800s growing from a Wych elm (Ulmus glabra). All current incarnations of the tree are grafted versions from the original mutant tree. Camperdown elms are renowned for...
The Camperdown elm (Ulmus glabra 'Camperdownii') is a rare elm tree cultivar that cannot be grown from seed. The tree was originally discovered in the mid 1800s growing from a Wych elm (Ulmus glabra). All current incarnations of the tree are grafted versions from the original mutant tree. Camperdown elms are renowned for their cold hardiness and their distorted, twisting habit.
Location
The Wych elm (Ulmus glabra), from which the Camperdown elm is derived, is a native of Europe that grows naturally from Ireland to Scandinavia, Iran and Greece. Like the Wych elm, the Camperdown elm thrives in cool, temperate climates. The tree does best in U.S. Department of Agriculture zones 4 to 7 and is more likely to suffer from summer heat than winter frosts. Plant in a full sun location for best results.
Soil
The Camperdown elm is tolerant of moist soil types, growing in a wide range of pH types so long as the soil has good drainage. Water regularly, about every week or so. This is especially important in the summer and when the tree is first planted. Watering regularly will ensure a healthy, extensive root system. Feed annually with a general purpose fertilizer in the early spring, before new growth has emerged.
Pests
The Camperdown elm is susceptible to a range of pests, most notably leaf miners. Leaf miners are a type of insect larvae that feed on foliage, leaving unsightly, disorderly tunnels on the surface of leaves. An insecticide containing imidacloprid may be injected in the soil via a soil drench, or the tree may be sprayed with a foliar spray in mid to late spring, when the miners first appear. Treatment is not typically necessary when a second generation of insects emerge in summer.
Disease
Camperdown elm is susceptible to Dutch elm disease (DED), a serious fungal disease spread by elm bark beetles. The tree typically exhibits withering, yellow leaves in the summer. Yellowing spreads throughout the tree, eventually killing whole branches and starving the roots. The disease is frequently fatal, and though it can be controlled with fungicide, the disease can never be completely eradicated. Camperdown elms in North America are less likely to be infected by the disease than trees in other countries.
