I started a new garden this year in my backyard and have ran into an issue with water standing in it making it difficult to get in and work. I have a small ditch(low area parallel) to the right of the garden on the low side but the whole back yard tends to stay saturated for a day or two when it rains. And right now it is raining every other day. I have not made any adjustments to the soil content like removal of original dirt or adding any topsoil or compost. Can the water issue be fixed by just changing out the soil makeup in the garden or will it require trenching ditches around the garden to help divert run off? I had a thought of digging out 2 ft of the garden and putting drainage rock and sand in the bottom 8-10" and then filling the top with topsoil and compost. My other thought is to trench a 12" ditch on the low side with a ditch cut in both corners to divert run off to the existing low area in the backyard.