Low allergen gardening

Please click on the links below to read our articles. If you are interested in research findings, click here for links to research reports.

Tom Ogren, creator of the low-allergen gardening concept, surveys FM editor Michelle B-J's garden and advises on turning it into a low-allergen sanctuary. October 2017

Two 14-year-olds from Ottowa, Jenna Devine-Ducharme and Zoey Phillips, win a place at the Canada Wide Science Fair for their aerobiology project linking pollen and allergy and making green spaces allergen friendly. Jenna tells us all about it. May 2018

Tom Ogren and the story of allergy free gardening. It is over 30 years since Californian horticulturalist Tom Ogren first realised that certain plants were directly responsible for some allergic symptoms. Here Tom talks about how he first came to understand the role of plants in allergy and where we are now in the campaign to manage that connection. March 2018

Pollen and particulates – the lethal combination of pollen grains and diesel fumes. Tom Ogren Talks to Editor, Michelle Berridale Johnson. October 2017

Birmingham City Council wins Gold Award at Chelsea Flower Show for low allergen garden! May 2017

Blog highlighting the 24 best and worst plants for allergy based on the ogren Plant Allergy Scale, OPALS. February 2016

Plant cross reactivity and its fallout for allergy sufferers. Environmental biologist Sue Killian describes how so many of our plants are inter-related, not only with each other but with many of the foods that we eat. January 2016

Can we blame male trees for the dramatic increase in the rates of hay fever? Tom Ogren says ‘yes’! February 2015

The Allergy Fighting Garden by Tom Ogren. A new book describing how the worldwide epidemic of allergic rhinitis/hay fever has been caused by the universal use of pollen bearing male trees in public spaces – and how this can be combatted. February 2015

The fungus aspergillus, found everywhwere in dead and rotting animal or plant material, especially inthe autumn, can cause serious illness in those with a weakened immune system, previous lung damage or allergic asthma. University Hospital of South Manchester (Wythenshawe) now houses a new centre for the study and treatment of Aspergillosis. October 2014

Poinsettia allergy – a personal tale from a sufferer - September 2014

Sneeze-free garden. Pop-up, low-allergen garden on London's Southbank. June 2014

Low Allergy Gardening. Alistair Rivers explains how to reduce risk of triggering an attack in your garden. June 2014

Alas, still no allergen-free gardens at Chelsea Flower Show – blog post. May 2014

The Green Legacy – Guernsey. An allergen-free gardening initiative. Nigel Clarke tells its story. May 2014

The uglier the plant or flower, the more allergy-inducing its pollens tends to be! May 2013

A Plan for Cities Wishing to Reduce Pollen-Allergies and Related Allergic-Asthma. With the hundredth anniversary of Chelsea Flower Show upon us, Tom Ogren of
www.allergyfree-gardening.com sets out his plan for cities wishing to reduce pollen allergies and related allergic asthma. May 2013

Tom Ogren suggests ways to reduce the pollen load in New York's streets. April 2010

An allergy-free gardener roams the Chelsea Flower Show. Tom Ogren makes his first visit to Chelsea. 2009

Birds, bugs and allergies. Tom Ogren explains how encouraging wild birds to visit your garden could help moderate mould allergies. 2009

Low-allergen gardening. Michelle Berriedale-Johnson reviews the options. 2007

Chelsea Flower Show 2004. The Royal College of Pathologists take up the Allergy Cause. 2004.

'Safe sex in the garden' and other flowery matters. Michelle Berriedale-Johnson has a sniff around Chelsea Flower Show. 2003


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Research reports


Genetically modified pollen free geraniums. August 2012

Safe composting tips for people with food allergies. July 2012

To reduce allergic reactions in the garden. August 2008



NB Information on this site is not a substitute for medical advice and no liability can be assumed for its use.

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