If you have a pack of olds seeds and want to know if they’re still good without using precious garden space, just place them on a wet paper towel. If sprouts start coming out of them, then they’re good and you can plant them in the garden!
DIY - Homemade Gabion wall ie rocks encased in wire baskets and used as a retaining wall - creates a dramatic feature in a garden. No directions on link. Nice someone figured out how to landscape with river rock. I swear they grow!