I put in a few sticks, some as big as 1″-2″ in diameter thrown in haphazardly to help with aeration and drainage in a new garden bed.
I don’t put rocks in the bottom of my raised garden beds since I’ve read that rocks can prevent good water drainage. Water pooling in the bottom of a raised garden bed can cause root rot and kill your plants. I put in a few sticks, some as big as 1″-2″ in diameter thrown in haphazardly to help with aeration and drainage in a new garden bed. Plus the sticks will eventually break down and compost over the years.