Mid Century Modern Pots and Planters: Square Low Planter 18" h | Stardust
Modern Fiberglass Tapered Square Planter
Amazon.com: Cshangzei 24 Pack Black Nursery Pots,3 Inch Plastic Square Plant Pot Flower Pots with Saucers,Seed Starting Pot for Indoor,Outdoor, Garden,Office,Balcony Decor : Patio, Lawn & Garden
Imitation Purple Sand Plant Pot Succulent Flower Retro Pot Balcony Square/Rectangular/Hexagon Pot Tray Bonsai Bowl Garden Decor - AliExpress
Mission Square Handmade Outdoor Planters | Pottery Barn
Osaka Large Square Garden Planter/Plant Pot with Rounded Corners: NOVA68.com