The organisation's administrative home is now located at Newlands Nursery in Chichester, where Fox works as administrative director for Hollyacre Plants.
Fox said: "The BPOA has been good for Hollyacre over the years and I thought it would be a good opportunity to get closer to it. I think it is important to help keep the association going."
He was introduced to the BPOA through Hollyacre sales and marketing director Simon Davenport who is also heavily involved with the organisation. Smith will continue to serve on the BPOA committee.
The association will be hosting a two-day event in Northamptonshire incorporating an AGM and technical conference. It takes place on 9-10 February at the Hellidon Lakes Hotel, Daventry.
Tobacco Whitefly will be a major topic of discussion at the technical conference after poinsettia growers raised concerns with organisers.
Fox added: "Tobacco Whitefly certainly has been a problem this year. From what I hear, it has given a lot of concern to a lot of growers."
The 10 February event is entitled Taking Control: Controlling the Most Important Pests of the Protected Ornamentals Industry.
Speakers will include Richard McIntosh from the Food and Research Environment Agency, John Buxton and Jude Bennison from ADAS, Gill Prince from HRI Warwick, Neil Helyer from Fargro and Tim Wilson from Brinkmans.