Janet Branson wrote:Mmm...coffee grounds, eggshells and worms oh my! : )
What does sinking it do that piling on top of existing ground doesn't do? Is it for aesthetic? I know some don't like mounds and piles, but I would be concerned that the spot would go anaerobic after a few days of hard rain, however I don't know the limitations you are working with. I'm also new to raspberries. Is that a concrete cylinder on the right side of the area?
The sunken garden keeps the water from washing away the top soil, its to retain water that is given it. also the concern of anaerobic decomposition is no worry as longs as the worms are tunneling and the
mulch is coarse like
straw or sun flower stalks.
Not a concrete cylinder, a wine barrel, because those were raised from the ground, I found it took to much water than what is was worth merely because it gets too hot in the summer.