Plant foreign tree species to build diversity and protect against pests and diseases, landscape professionals advised

Tree consultant and landscape designer Peter Thurman has urged landscape professionals to consider planting foreign tree species to provide diversity in the face of growing pest and disease pressure.

Peter Thurman with Lagerstroemia indica - image: Barcham Trees
Peter Thurman with Lagerstroemia indica - image: Barcham Trees

Speaking at a seminar at Barcham Trees, Thurman recommended several non-native but dependable species including:

  • Lagerstroemia indica, the crape myrtle, as a good street tree which will tolerate temperatures down to -20°C;
  • Quercus palustris, the pin or swamp oak, which despite its name will tolerate drought and is not affected by oak processionary moth;
  • Cercis siliquastrum, the Judas tree, which remains compact in size;
  • Ilex castaneifolia AGM, the chestnut-leaved holly, which is generally pest- and disease-free.

However he described Prunus x subhirtella 'Autumnalis' as "a poor tree in every respect", and advised using variegated and purple-leaved trees only in moderation, saying "let green be god".

The seminar brought together landscapers, developers, house builders, utility and highway engineers, architects and tree officers to hear the Trees and Design Action Group (TDAG) explain its recently published Trees in Hard Landscapes- A Guide for Delivery.

Using the example of the landscaping of the Bomber Command Memorial at London's Hyde Park Corner, in which which he was closely involved, Barrell Tree Consultancy managing director Jeremy Barrell stressed the importance of up-front collaboration between disciplines.

"Traditional team working often involves various people pulling in different directions in an attempt to become dominant," he said.

"There is very little discussion between disciplines, and you end up with a project which does not fit together quite right. A disjointed approach is a disaster."


Have you registered with us yet?

Register now to enjoy more articles and free email bulletins

Sign up now
Already registered?
Sign in

Read These Next


Follow us on:
  • Facebook
  • LinkedIn
  • Twitter
  • Google +

HORTICULTURE WEEK BUSINESS Awards 2020

The Horticulture Week Business Awards is now open for entries

Horticulture Jobs
More Horticulture Jobs

HW Top UK Arboriculture Businesses

See our exclusive RANKING of arboriculture businesses by annual turnover. 

BUSINESS LEADs

Build your business with the latest public sector tenders covering landscape, arboriculture, grounds care, production and kit supplies. To receive the latest tenders weekly to your inbox sign up for our Tenders Tracker bulletin here.

HORTICULTURE WEEK Custodian Awards

Find out more about the outstanding parks, gardens and arboricultural projects and teams that became our Custodian Award 2019 winners.

Jeremy Barrell On...

Jeremy Barrell

Tree consultant Jeremy Barrell reflects on the big issues in arboriculture.

Products & Kit Resources