>> My yard slopes and erodes, so I had to adhere the cinder blocks together somehow to keep them from shifting
Wow, that sounds like a lot of slope! But then, my soil is clay that will take an edge and stand up perfectly vertical and square for a few years, despite months of drizzle and a few hard rains. I thin k of it as requiring dynamite to shift soil ... but sandy soil probably flows with gravity or the wind.
>> The best part is how cheap the cinder blocks are!
I didn't know that, I just assumed the opposite. Hmm, I see some applications for a heftier bottom row!
>> recycled plastic slates ... without sinking down
That's good. Even light cedar slats tend to sink into my soil. I was trying to get some 2-3 inch "steps" into the soil surface of a bed on a slope, so that watering would sink in and not run off.
Are those the "plastic wood" that I sometimes see?
