The deal, which was concluded at the end of last year, sees Flora-tec chief executive Andy Bradley step into the managing director role at Elmy Landscapes.
Since its inception in 2000 Elmy Landscapes has grown to a turnover of £1.3m.
Founder Peter Elmy remains at the landscaping firm as its general manager, along with the rest of the team.
Clients include Colchester Borough Council, Carillion and Suffolk County Council.
Headquartered in Cambridge, Flora-tec operates throughout the UK from branches in Ware, Esher, Birmingham, Chester and Leeds.
Flora-tec clients include Hand Picked Hotels, Sharp, Fujitsu, Roche and the Audit Commission.
Flora-tec was formerly part of Cambridge-based Unwins, and was the subject of a management buyout led by Andy Bradley in 2007.
Bradley said: "This is a great opportunity for Flora-tec to extend its range of services and customers in East Anglia.
"In particular Elmy's representation in the public sector market is something that Flora-tec hope to build on."
The deal was put together by PEM Corporate Finance and partner Lake Falconer said: "Elmy Landscapes is an ideal acquisition geographically and it should give Flora-tec access to new markets. It shows that despite the recession there are deals to be done where there is a good strategic fit."
Subscribe to Horticulture Week for more news, more in-depth features and more technical and market info.