Polypodium guttatum Urban Tree Farm Nursery 12 Rare Variegated Houseplants You'll Love Gardening Plant physiology in 60 seconds: The 5 major hormones that regulate your crop. Your crop's growth isn't random; it's guided by 5 key plant hormones. Understanding how this internal system works Ovalblttriger Liguster, Ligustrum ovalifolium Ficus cyathistipula African Fig This air purifying plant is one of my favorite among our ficus collection. Deep green thumbler shape leathery leaves, dense foilage, fig fruit is a cherry on top