Most ACT government irrigated sportsgrounds will close for a two-week maintenance period from Tuesday to prepare for the winter sport season.

The government says the maintenance includes top dressing surfaces, installing goal posts, line marking ovals, upgrading turf, fertilising and in some locations adding coconut fibres into the soil to help with better water retention on ovals.

During the maintenance period, 25 ovals will remain available for booking to accommodate pre-season training.

The traditional sportsground maintenance period is carried out twice yearly at the beginning and end of the summer sport season.

All grounds will re-open on April 1.

The 25 fields that will remain open over the next two weeks include:

Bonython (2 fields)
Hughes (2 fields)
Cook (1 field)
Isabella Plains (2 fields)
Giralang (1 field)
Latham (3 fields)
Gowrie (5 fields)
Pearce (2 fields)
Holt (7 fields)

Woden Park (athletics) will remain open as well as synthetic grass fields at Holt (1 field), Nicholls (2 fields) and Pearce (1 field).