We call it a "Big Garden" because we are amateur gardeners, okay people? Sometimes I kill plants unintentionally, but I always love to try growing them.
To make the garden accessible for most people, I asked my husband to make the entry and garden path inside of the square 36 inches wide. This will allow plenty of room for any person with a walker or cane to come look at my plants or weed for me (for free of course). Anyone who walks will have no problem carting a wagon of tools around a pathway this size. My clients who find it difficult to lean and reach for items will like this type of design to avoid losing their balance.
The garden path width will also allow a wheelchair user to come inside, BUT this would be a very tight squeeze for that person when you include hand rims. Ideally, the width of the path would be 60 inches or have one spot that is 5'x5' to turn in any direction. My garden design works for people with smaller width wheelchairs and only gives them the ability to go forwards or backwards.
The other bone of contention is my power wheelchair user friends would not be able to come into the garden. They would need a 6'x6' turning space to safely navigate my garden without bumping into the bed walls. Power wheelchairs can often cost the same as a car! So we wouldn't want to accidentally damage my friend's mode of transportation!
Another thing to consider is how tall to make the garden bed walls. The minimum recommended height for raised garden beds is one foot for plant roots to spread. There is no rule for a maximum garden bed height, but be wary of the need to reach up too high to tend to your plants. For our purposes, we are going to make the bed walls two feet high. If that is too low, we can certainly add on to the wall height in the future.
Building taller raised garden beds, like four feet high, will work better for people who feel pain while bending to the ground. I would recommend bringing a light stool in your garden wagon in order to sit and work on the plants. Sitting to garden conserves energy, limits pain, and improves your balance. You can also use a raised garden bed with legs that will give more room for your lower body while sitting to tend to plants like the picture below.