The Best Soils for Growing Vegetables Recommendations from Bob Vila Planter Box Liners Flower Box Root & Vessel Wooden Stacking Flower Pots, 3 Set Colored Organics Thinking about grabbing a standard bag of potting mix for your patio containers? Most store bought mixes are 'sterile.' That sounds clean, but in the soil world, sterile = dead. You're basically Wellco 6 Pack 5 Gallon Air Pruning Containers 11.81 x 11.81 in. Plastic Nursery Pots for Plants and Gardening