I never put any weight in the molds. I actually have ppl give them to me all the time and the 1st thing I do is remove any and all sandbags etc. They all hold moisture and are not good. I simply put a stake behind each mold (we have over 200 in our display) and then attach the mold to the stake with galvanized 20 gauge bailing wire. I put a minimum of 2 on each mold and the large ones get 3. We get alot of wind and I very rarely have to do anything to maintain the molds through the lighting season.