Calcutta, July 4  :    Calcutta, July 4 :  Morning-walkers at Shibpur Botanical Gardens have locked horns with the Botanical Survey of India (BSI) over holding a cultural programme on the garden's premises. The BSI has turned down an offer by the morning-walkers to organise Rabindra Jayanti in the garden. The daily visitors, comprising some senior teachers of Shibpur B.E. College, complained on Wednesday that they were being 'unnecessarily harassed' on the issue, as they had earlier opposed a decision to impose entry fees on visitors. 'We had sought a small spot near the garden's main gate to put up a brief function one morning this week to commemorate Tagore's birth anniversary,' said A. Mitra, one of the morning-walkers. According to another member, the outpost police were harassing them for vague reasons. 'They urged us to meet the officer-in-charge of Shibpur police station, but police officials there said they were not informed by the garden outpost,' the member said. 'A private organisation can't be allowed to use the garden premises. If it is granted permission, some other club may come up with a request to hold a pop music show. The garden is maintained by the Centre-controlled BSI and we have to abide by some rules,' said G.S. Giri, a Botanical Gardens official. Employees said that the morning-walkers were asked to organise the function in one of the pavilions, which are let out to picnic parties, in the morning and wind up by 10 am. But they had refused the offer.