Crews from Winchester, St Mary’s, Eastleigh and Alresford were on the scene shortly before 5pm after the HIWFRS Control Room had received multiple reports of a large smoke plume.
The fire, affecting an area of 150m-by-100m, was being driven by the wind before it was contained by firefighters using jets and beaters.
Fire engines left the scene at around 7pm before one crew returned to conduct a reinspection later on in the evening.