Police found two large cannabis grows when they raided houses in Marl Hill Crescent, Ribbleton, and Birkdale Drive, Savick, this week.
Officers from Preston Neighbourhood Police executed warrants on Thursday and recovered the class B drugs and growing equipment.
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A spokesperson said: “These warrants come from information provided by you the local community.
“Your Neighbourhood team will deal with any information you have relating to criminal activity and we would encourage you to keep up the great work with passing this on to us.”
If you have any concerns or information about issues in your area please contact police on either 101, via the Lancashire Constabulary website or via Crimestoppers on 0800 555 111.