Woodside Square Wooden Garden Planter Box, Outdoor Plant Pot with Liners (pack of 2) : Amazon.co.uk: Garden
Rustic Scandinavian Redwood Medium Brown Square Wooden Planter for Garden, Outdoor Plant Pot by HORTICO H31.5 L41.5 W41 cm, 53.6L - from £28.49 | Getpotted.com
Small Square Wooden Planter - Wooden Planters - Busy Bee Garden Centre
Build a square planter box from cedar | TwoFeetFirst