Bosses at York-based Green-tech wanted to add irrigation to its portfolio and will handle sales of kit including the Mona Plant underground self-irrigating system.
Richard Kay, Green-tech's managing director, said: "This is an excellent addition to our range, and offers us opportunities in interior landscaping, green-roof schemes and export markets.
"Tricor's range of water-saving and irrigation products forms an important complementary addition to our range.
"We have a commitment to introduce a minimum of 50 per cent of our range from either recycled sources, or offer products with environmentally friendly benefits by the end of 2010."
Green-tech recently introduced a Ground Reinforcement Block, made in the UK from recycled plastic. It also produces topsoil made from recycled materials.
Operations director Rachel Kay said her 29-staff company made a turnover of around £6m, and Tricor made around £500,000.
Yolanda Lacey, who owned Tricor, is remaining with the firm for a transitional period.