Speaking at a skills seminar at the Royal Horticultural Society last month, Sue Minter, the charity's director of horticulture, said: "We place the disabled behind the scenes. We have a responsibility for professional horticulture's image."
She added: "It's been traditional for low-ability people to go into agriculture and horticulture. This is a very difficult and controversial area. We need to have some way for dealing with it."
Her comments were reported in Horticulture Week magazine. A few days later the Eden Project issued a statement saying that she had resigned.
A spokesman for the Eden Project said: "Sue Minter regrets suggesting that the Eden Project placed disabled people behind the scenes, when this is certainly not the case. We work positively and proactively with disabled people, and organisations representing them, in many areas."