Designed a lovely vegetable garden with a geometrical design of edged beds and gravel paths, and a central path with a pergola to train apples of to make a tunnel of apple blossom in spring and a tunnel of apples in autumn. So far, so good, and it looks lovely at all times of year. But then, because I am in a frost hollow on heavy clay with appalling drainage, I chose a rootstock not as dwarfing as it could be, in order to give my apples a better chance of coping with the adverse conditions. Turns out they didn't need it. My veg garden is now my "shade garden" and my veg are now grown in tubs up on the terrace where we park the cars.
We have a lovely pond full of frogs and newts. The ground is sloping, so the pond is ground level at one end and built up about 30 inches above ground level at the other. We didn't think about cutting the adjacent hawthorn hedge. So twice every year I choose a dry day to teeter along the retaining wall or the pond with hedge trimmers, and a sack balanced on the 6inch wide wall in front of me.
Anyone else like to share their design mistakes?