Group chairman, Martin Davies of Raglan Garden Centre said:
"This is a notable addition to the group. Poplars are a recognised industry leader who over the years have remained fiercely independent of groups but have now accepted the huge benefits of collaborative buying and the strengths of joint marketing. We welcome them on board and value the quality and expertise they can bring to the group."
Poplars MD David Little said:
"We are looking forward to working with our friends and colleagues within Future Marketing and their supplier base. The advantages of working together, sharing resources and new ideas became apparent almost straight away.
"Future Marketing has demonstrated considerable success with increased purchasing power and effective marketing initiatives by forging strong and lasting relationships with leading suppliers and manufacturers. Future Marketing can achieve results that we, as an independent business, could not achieve on our own.
"The group's existing philosophy and direction very much fit with our own business plan and by working together I firmly believe we can achieve even greater success in the years ahead."
All-in-One was the last to join the group, in 2008. Other members are Azure, Garsons Esher, Garsons Titchfield, Lintzford, Millbrook, Pennells Lincoln, Pennells Cleethorpes, Raglan, Thurrock and another All-in-One in Knutsford. Grosvenor left this year after being bought by Blue Diamond.