This varies on your location, but some of the most popular choices for greenhouse businesses include bedding plants in the late winter and early spring, garden flowers in the summer, and holiday-themed plants in the fall and early winter. Since greenhouse profits are so seasonal, its essential to have several options to grow so that you can grow all the way through the year.
Diversify like you would a stock portfolio. Keep some favorite options like evergreen shrubs in stock, while still keeping eyes out for trendy new choices. Are houseplants big right now? Succulents? Orchids?