The screen uses recycled plastic pallets, framed and secured to upright posts. The width of the finished screen will depend on the size of your pallets (here, 1200mm wide) but the height should be at least 2000mm to create an effective visual break. We built two screens and offset their positions – this creates an effective visual barrier while also allowing easy access.
Note: These instructions will make one green-wall screen.
Gather your supplies
• 100 x 100 x 2700mm H4 treated pine posts (2)
• 2400 x 1200mm sheet marine ply
• Plastic pallets to suit (2)
• 138 x 18 x 2000mm decking (2)
• 90 x 45 x 2400mm H3 treated pine (2)
• Geo-textile fabric
You’ll also need
Stanley knife; plastic cable ties; drill; treated pine screws (75mm and 50mm); clear waterproofing paint; hole saw; manual post-hole digger (hired); spirit level; quick-set concrete; stepladder; potting mix; selection of plants
Lie 1 plastic pallet on a bench. Spread over geo-textile fabric and use Stanley knife to cut a piece of fabric to fit.
Turn pallet over and cut fabric to fit over any protruding sections. Fix fabric to pallet using cable ties. Repeat Steps 1 and 2 for second pallet.
To make frame for green wall, lie sheet of ply on work surface, then butt join decking to 2 long sides and 1 short side using 50mm screws. Position lengths of H3 treated pine along inside of frame as supports and cut to size. Secure through sides and base using 50mm screws. Paint plywood with waterproofing paint.
Put 1 fabric-lined pallet inside frame and secure to pine supports using 75mm screws.
Using hole saw, remove sections of plastic membrane to create holes for planting.
Using post-hole digger, excavate 50cm deep holes at a distance to match width of frame.
Cut posts to match height of finished frame, plus 50cm. Position posts in holes, then check with spirit level. Secure in position with quick-set concrete.
Secure frame to posts using 75mm screws. Part-fill area between pallet and frame with potting mix, packing down to ensure there are no air pockets.
Cut slits in fabric lining pallet and feed through plants, supporting roots behind the fabric with your other hand. Top up with more potting mix, then continue planting until pallet is full.
Using stepladder to reach, secure second pallet above lower pallet and repeat planting process.