This Stackable Self Watering Garden Planter for Vertical Gardening, Growing Herbs, Flowers, Strawberries, Cactus and House Plants Holds up to 20 Plants. This Plan Containers Can Easily Be Rolled and Used Indoors, or Outdoors and Will Compliment Your Patio Furniture, Deck or Balcony. Stackable Self-watering garden planter Vertical gardening Holds up to 20 plants Great for indoors, or outdoors