"He's tethered in me pumpkin patch. Thought he oughta see the trees an' - an' smell fresh air - before - "
--Rubeus Hagrid while awaiting Buckbeak's executioner (PA16)
Harry sees twelve enormous pumpkins there during his second year (CS7).
There is some conflation between the pumpkin patch and the vegetable patch, which are both behind Hagrid's hut. CS7 says the pumpkins are "in the small vegetable patch."