"We have enjoyed a long-standing and greatly productive working relationship with Ortho and the Scotts' brand," RFR President Steve Newmark said in a statement. "Over the course of the last decade they -- at different times -- have been able to successfully activate various marketing platforms through our partnership.
"They had great success activating around Greg and the No. 16 team and I think all of us enjoyed the 'What's Buggin' Biffle' promotion. However, their marketing strategy for '16 will take them in a different direction. We would of course welcome working with them again in the future and look forward to that possibility."
Various Ortho schemes -- including Bug-B-Gone, Fire Ant Killer and Home Defense -- covered Biffle's car for 15 races in 2015. Previously, Scotts had sponsored cars for Roush Fenway Racing from 2005-11.
Company spokesman Chris Strunk provided the following statement to SportsBusiness Daily: "We evaluate our sponsorship portfolio on an annual basis and have decided not to renew our partnership agreement with Roush Fenway Racing. Roush Fenway and Greg Biffle have been terrific partners, and we wish them the best. We are extremely appreciative of their participation and support of the Ortho brand."