Officers found the plants in various stages of cultivation, from seedlings to fully-mature plants, growing in the property's backyard.

The crop was looked after with a watering system connected to the house and sun protection.

Police also discovered methamphetamine - or crystal meth - inside the house, plus drug paraphernalia and a sum of cash suspected to be the proceeds of crime.

Two 20-year-old women and a 24-year-old man will be summoned to appear in the ACT Magistrates Court at a later date on charges of cultivating and possessing cannabis, plus further drug charges.

ACT Policing has urged anyone with information about the distribution, manufacture or sale of illicit drugs in the community to contact Crime Stoppers on 1800 333 000 or via act.crimestoppers.com.au.

Information can be provided anonymously.