Reading Grassroots Action opened its Common Ground Community Garden in 2007 after creating it on council land that had been left to waste.
It is now set to welcome visitors once more for a free fun day to celebrate the gardens survival in spite of eviction attempts, vandalism and court injunctions, explained spokesman Stuart Melvin.
"Since turning a council-owned derelict plot into a beautiful community garden, we and our neighbours have ignored injunctions, protested eviction attempts and even faced arrest," he said.
"But finally, we have not only definitely won new sites for at least one community garden, but Common Ground itself has been granted a legal license for a fun day.
"We would really love to welcome everybody to the garden one last time and thank everyone who has supported the project."
The event in Silver Street, Reading, will run from 2pm until 9pm this coming Saturday with music, face painting and other attractions on offer.
Gardeners in the area will be likely to flock to the event to pick up ideas for their own greenhouses and gardens.