We have a selection of pond plants all in buckets waiting for the new pond to be finished, but I am hoping to get lots more plants (if I rob the bank). When I was at the ye olde pond shoppe today I noticed they sell the baskets and compost, but also hessian basket liners. Do I need to line the baskets before planting the plants? I have never done this before and I think the plants have always done okay but am now wondering if I am doing things wrong.