Grow plants with more tactile and olfactory stimulation. Use vertical planting. Create smooth surfaced paths. Difficulty lifting and moving objects. Falling is more likely.
Gardening becomes more difficult.
Raised beds reduce the need to bend or kneel. The edges of raised beds can provide a place to sit while gardening. Stools provide an intermediate step between standard gardening and raised beds. Adaptive tools with better leverage and improved grips help make gardening easier. High and low temperatures are not tolerated as well.