So... these tomato cages.
This was the first iteration, constructed on the weekend of November 7th/8th.
Second iteration... no idea when it was finished
Third "iteration," completed sometime last week (I think)
So the idea is this. Its like a tomato cage but it is stepped instead of fully conical. Looking at the third iteration, the thin bottom section would be what sticks into the ground. The flat area above that lies on the ground and is covered with landscaping fabric. The top section is like a regular plant cage, but it will have an area for some type of tactile label (possibly braille) so that the gardeners can tell which plant is in which caged area.
The logic behind it is this: The landscaping fabric discourages weed growth around the base of the plant. The cage also provides a definite boundary for each plant. In this way, it is easy for anyone to determine if something is a weed or not. Essentially, if a plant is growing outside of the cage, then it is a weed!
These cages also provide protection for the plants. Mainly, protection from the gardeners themselves. I have heard multiple stories about gardeners accidently kicking a plant or stepping on one while they were not being careful. These cages protect against that.
The area for a label is important too. Many visually impaired gardeners rely on learning which plants are which by feel or smell. However, for the novice gardener this could be horribly difficult. A label will ease this difficulty. Along with that, knowing which plant is which aids (kind of) with navigating the garden (i.e. if I am near the tomatoes I am closer to the road than the house) and with harvesting (i.e. pick cucumbers instead of zucchini).
These could also be used to help plant in straight lines with some type of wire guides that integrate with the cages.