An attractive, highly functional greenhouse has innumerable opportunities for profitization. A retail greenhouse can improve its shopfront in order to attract foot traffic and nearby public. Here, produce and flowers and shrubs can be sold themselves, or artisan goods made out of your greenhouse produce like jams, jellies, butter, etc.
Design classes and events that will attract attention and people to your greenhouse. Teach gardening tricks, skills that you know, or cooking classes with organic food included.