Chelle,
Owen has very limited use of his hands, but he loves to touch whatever he sees. I do want him to feel the earth, to caress the leaves, to indicate which flower he likes, and eventually point out which two flowers we should cross.
I envision that Owen's chair will tuck under the box. I have not as yet worked out all the logistics about that detail. There will be a nice walkway for him to use to approach his flower box.
James,
Your suggestion seems very logical. If I use thick wooden boards, 12 inches should be just enough depth for daylilies. Thank you.