Some Grey and Silver Plants Homemade Fertilizers Guide. HOMEMADE FERTILIZERS GUIDE BANANA Chop bury near roots water potassium boost. COFFEE GROUNDS Sprinkle used grounds aroud plants improve soil ac cidity and organic EGGSHELLS Crush mix for Understanding Evapotranspiration (ET) Weed of the Month: Bittersweet Nightshade Brooklyn Botanic Garden Camellia sinensis, the tea plant, can be grown in USDA hardiness zones 7 9 in acidic, well drained soils that are high in organic matter in partially shaded areas. Tea plants, like other camellias,