Always worked good for me. My old one was made out of regular untreated pine, rotted at the corners and finally fell apart--it was too big anyway. This time I used treated pine which I hope will last more than 5 years. What I do is fill all the voids around the pots with soft, fairly dry soil up to a level of one inch or so from the top of the pots when tamped lightly. Some settling will occur. This soil will allow perculation up and into the pots on one hand and will allow perculation down and out of the pots on the other keeping moisture content fairly ambient to the surrounding garden soil. Pots are tipped almost flat with bottoms facing each other for heavy rain watershed opposite and away the pot tops. Well rooted new seedlings will hold everything intact nicely--but don't use the method for newly planted bulbs in fresh soil. After the soft dirt is added, about 2 inches remain for filling with large, coarse, dried wood chips with a slight crown. The hardware clothe is then tacked down and a few more chips added. Mulch as needed when required. Company came and interupted me from getting pictures of dirt filling step.
There is hardware clothe on the bottom as well. In the Spring after the pots are removed, this unit can be raised (Spring soil falls thru the hardware clothe with a little teasing) and used for something else or left in place. The boards from the old one worked nicely in between the rows in my lily garden for me to walk on.
