Many stallholders at Bath's Farmers' Market say they are unhappy about plans for expansion. The local eco-group Envolve has taken over the market and said it wants to attract more traders and a greater variety of products.
But those who currently work on the market say they are worried that the character of the event will be ruined.
There are also fears that they may lose control and be saddled with significant rises in rent.
The market has strict criteria for locally produced goods.
Traders are meeting with bosses next Saturday.