Cannon provides grounds maintenance, interior landscaping, arboriculture, landscape design-and- build and street-cleansing services at Ministry of Defence sites in the South West and East, the Bank of America in Chester and Fujitsu in the South - as well as shopping malls, leisure centres and schools.
OCS Group, its £630m-turnover Surrey-based parent company, has operations worldwide.
OCS principal landscape architect Andy Gorton said the firm had developed from an interior landscaper into more of a grounds maintenance specialist. He added: "The name change will make us be seen as a more cohesive company. It makes more sense and reflects our 'one complete solution' logo."
OCS Horticulture managing director Ray Rushworth said: "The Cannon brand has exceptional strengths in hygiene, washroom and consumables, but the horticultural services we offer have much stronger links with the wider OCS service offering.
"We think this move will help our clients understand better where we fit within the OCS Group and will also help us with our ambitious plans for growth."