Industry veteran Andrews said: "I started in the seed trade in 1954 so my association with PAC has been for a third of my working life."
He joined Elsner in 1991 shortly after the company was re-privatised, to help develop UK market share.
During the 23 years, the market has changed and the number of companies maintaining pelargonium mother stock has reduced, with importing clean unrooted cuttings for own rooting or using rooted material more common now.
Elsner has expanded its production of unrooted material of pelargoniums and basket and patio plants to meet demand with cirus-free stock in six countries.
Eagle Plants of Banbury will continue as exclusive partner in the UK for the supply of material either unrooted or rooted.
Andrews will still be available to PAC and Eagle Plants as a consultant.