|Need tips on installing a retaining wall for my garden beds - i plan on using concrete blocks that measure 16|
Retaining wall are outside of our expertise. There is a lot of info on the web (try a google search for: "retaining wall" construction
I can tell you that there needs to be some way for water to leak through the wall (weep holes) and it usually helps to have a vertical layer of gravel behind the wall. The weep holes prevent a buildup of water that would tend to push the wall outward.
Thanks for the question. Please stop in again soon!