Many have mentioned raised beds as an aid for gardening with physical limitation. All in my family are active gardeners and my brother who supplied produce to friends, family co-workers and neighbors for decades needed to come up with a realistic plan as he now has Parkinson's. He figured out a budget friendly plan on a massive scale. He collected 5 old aluminum fishing boats, deep V and Jon boats very cheaply and raised them up on cinder-blocks. His grown sons came for a visit and helped getting the boats raised up, but he did the rest. Took out the plug (he lives in a dry region so no need for other drainage holes) and started composting all his garden clippings and waste from his large in ground garden. He also added manure and screened dirt, then let is all compost for a year. Today has cut his in ground vegetable gardening almost completely out because of the astounding results he is getting from his raised bed garden boats. Also less water is needed in a area with water rationing at times. The joy gardening brings him is so good for him as he lives alone and Parkinson's sufferers are prone to depression.