A public servant who worked with ACT Health's alcohol and drugs services has been sentenced to two-and-a-half years jail for growing marijuana.

Mark Vincent Blattman, 51, was arrested in June after police found 75 marijuana plants on his property in Sutton, north-east of the ACT.

Police say the plants were valued at $150,000.

Blattman pleaded guilty to cultivation of cannabis and other charges.

He told the Queanbeyan District Court he grew the plants to help his wife who suffers from chronic migraines.

Blattman worked as a drug and alcohol counsellor with ACT Health before his arrest.

Today District Court Judge James Bennett SC sentenced Blattman to two-and-a-half years' jail, with eligibility for release in June next year.