In this episode we define some terms that plant geeks toss around, and give you a recipe for figuring out what’s wrong with your houseplants. If you’ve ever wondered why fertilizer is called “plant food” or how lichen can grow on a rock or your roof, this is your podcast! :28   Plant Noob:  Semi-Evergreen? Sub-shrub? 3:39  Eat/Drink/Grow:  Diagnosing problems on houseplants. 17:45 Focus on Fertilizer:  Why fertilizer shouldn’t be thought of as plant food. 19:24 Love Letters and Questions  Nina asked “How the heck does lichen grow/stay alive on stones and dead branches?”