The Hood River County Planning Commission will be conducting a public hearing this evening on a time, place, and manner ordinance for the production, processing, and retailing of recreational marijuana.  County Community Development Director John Roberts says planning staff took a basic approach toward the ordinance, proposing farm and forest zones to allow growing, processing in exclusive farm use and industrial zones, and retailing in commercial zones, while staying away from residential zones.  Roberts adds staff is recommending no marijuana operations be allowed in rural residential zones.  He noted the average size of rural residential properties in Hood River County to be about two acres, which is much smaller than most areas.