Hi, this is Rick with Gardens by Rick. And, I'm going to show you how to plant in a large container and save some soil. The best way I have found to save space in large containers is to use packing peanuts or any kind of large Styrofoam pieces that sometimes come in the packaging when you buy electronic items, and other items that are shipped across season have big chunks of Styrofoam. The reason I like using Styrofoam is because the Styrofoam does decompose in time, it stops it from going into the landfills and taking up space in other areas that aren't good. And, it's really useful because it's very light, and it makes the pot not so heavy to use and work with. And, it works well, I've never had a problem. And, basically, you get your pot that you're going to plant in, a lot of times they're large, tall urns, and you don't need that much soil for the plant's roots to grow properly. So, fill the bottom with pieces of broken Styrofoam, or packing peanuts, or anything with a Styrofoam nature. Fill it up to at least a level to where the plant's needs are accountable, and they have been thought about. If the plant has a low surface or low root system, you can use more packing peanuts. But, make sure you read up a little about what you're planting, and how much surface of soil they actually need to properly grow and stay nourished. Once you have the packing peanuts in place, and you know the right level of soil that the plant needs to properly live, then you add your potting soil. Use only - organic material is always recommended. Organic is always the way to go, especially if you're going to be planting any kind of vegetables, or anything that you're going to be consuming, because you don't want to take in any harsh chemicals that are found in some of the scientifically created plant foods. That being said, once the soil is in place and is compacted really good, you do want to shake it very good to make sure that all of the little empty spaces and crevices within the Styrofoam that you've put inside the pot definitely gets filled, and it doesn't settle later, causing a unlevel finished product with your plants that you've planted. You want it to stay level and stay solid once you've compacted it and done that. Once again, I'm Rick Feldman, and that is how you save some potting soil, and plant in a large container.