The Gardeners Guild has arranged with the LoneALERT company to provide a text message check-up service which can locate the phone through GPS and send help if needed, even in areas with no mobile phone signal.
Members, 80% of whom are sole traders, will be able to get the assistance at a third of the cost of buying as individuals.
In October, the Health and Safety Executive released details of several accidents befalling agricultural and horticultural workers, including the case of an arborist working alone who was found unconscious suspended from a tree.
Guild member Alan Sargent said: "I think it’s a very important initiative. Lone working is a very important subject, some of the work members do is quite dangerous and some of the sites we go out to are very remote."
Guild founder Gary Edwards said he had seen LoneALERT on the Susy Lamplugh Trust website and thought it was a good idea.Guild membership costs £40 in the first year and £30 every year after that. Membership benefits include other discounts, for example in insurance, and access to a health and safety helpline.