The planters are well made having drainage holes in the upper shelf and bottom of the planter with raised feet to keep the bottom of the planter from touching the surface of the deck. Its spring and have just introduced them to my deck. The construction is good and they are heavily weighted and will certainly not blow over in a storm. They come with a 1/4 " of styrofoam on all four sides and this will hopefully keep the plants from dying in the cold weather and cool in the heat. Time will tell. It was a chore to move them about alone and easier with help.