Pot plantations laying waste to national forests KNKX Public Radio Building Trellis Cedar Planters Brooks & Stone Clearance garden finds and plant holder deals Some of the natural fertilizers for your houseplants: Coffee Grounds: Great for acidic loving plants like Fiddle Leaf Fig, Peace Lily, and Calathea. Plus, it's a wonderful way to repurpose your morning brew! Container plants are overfed more often than garden beds because nutrients have nowhere to escape. A little extra fertilizer in a pot can concentrate quickly around roots and create toxic conditions fast. Century Plant seed pods, Cool Canyon, Anza Borrego Desert State Park, CA, USA 120328 30231 Stock Photo Alamy