She said it remained unclear when people would be able to retrieve their belongings but a letter dated 17 October stated that anyone entering the site unauthorised would be prosecuted.
“They [the owners] have talked about arranging one day for us to get on and get all our stuff off but with no vehicle access,” she told BBC Look North.
“So that would involve dismantling everything in a day and carrying it all the way back down that track to a vehicle.
“It’s just not feasible.”
According to Ms Emberson, they were told any additional day of access would cost them more than £3,000.
Paul Campbell, who has used the site for 41 years, said it had been his “escape” while caring for his mother full-time for nearly two decades.
He said he had initially planned to hand over his plot to an autism support group this year but was now unable to.
“It’s ridiculous really, it’s a major facility in Darnall,” he said.
“We had no warning at all, they treat us like dirt. They have for the 10 years they’ve been here.”
Sheffield City Council confirmed since the closure earlier this month, it had worked with police and the RSPCA to remove livestock and other animals from the site.
Where appropriate, it had offered support to allotment holders and would continue to offer advice as needed, the local authority said.
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