![looking for suggestions to join 3 layers of vegetable planter box together internally. I am almost finished building them. I want to do it internally, I was thinking some 90 degree aluminium looking for suggestions to join 3 layers of vegetable planter box together internally. I am almost finished building them. I want to do it internally, I was thinking some 90 degree aluminium](https://preview.redd.it/looking-for-suggestions-to-join-3-layers-of-vegetable-v0-etglgbukoqp91.jpg?auto=webp&s=0d05dce085c10c77ede970a8e3670da04cd41b4c)
looking for suggestions to join 3 layers of vegetable planter box together internally. I am almost finished building them. I want to do it internally, I was thinking some 90 degree aluminium
![Raised Garden Bed Planter Trough Zinc Aluminium Vegetable Flower 2 Metre Beige for sale online | eBay Raised Garden Bed Planter Trough Zinc Aluminium Vegetable Flower 2 Metre Beige for sale online | eBay](https://i.ebayimg.com/images/g/9twAAOSw8flj5MCP/s-l225.jpg)
Raised Garden Bed Planter Trough Zinc Aluminium Vegetable Flower 2 Metre Beige for sale online | eBay
![ADEZZ Aluminium CIRCUM Bottomless (Vegetable) Planter (8 sizes): D120cm x H60cm: RAL 7021 Black Grey (powder coated - AMWBG - ADEZZ - Riverhill Garden Supplies ADEZZ Aluminium CIRCUM Bottomless (Vegetable) Planter (8 sizes): D120cm x H60cm: RAL 7021 Black Grey (powder coated - AMWBG - ADEZZ - Riverhill Garden Supplies](https://www.riverhillgardensupplies.com/img/product/12adezz-aluminium-circum-bottomless-vegetable-planter-8-sizes-d120cm-x-h60cm-ral-7021-black-grey-powder-coated-13594-600.jpg)
ADEZZ Aluminium CIRCUM Bottomless (Vegetable) Planter (8 sizes): D120cm x H60cm: RAL 7021 Black Grey (powder coated - AMWBG - ADEZZ - Riverhill Garden Supplies
![ADEZZ Aluminium CIRCUM Bottomless (Vegetable) Planter (8 sizes) - AMW - ADEZZ - Riverhill Garden Supplies ADEZZ Aluminium CIRCUM Bottomless (Vegetable) Planter (8 sizes) - AMW - ADEZZ - Riverhill Garden Supplies](https://www.riverhillgardensupplies.com/img/product/12adezz-aluminium-circum-bottomless-vegetable-planter-8-sizes-13603-1600.jpg)