There are many large container planting ideas that you can try out. You can plant bedding flowers, small trees, vegetables, fruits and shrubs. You can make a mixture of trailing plants with the upright plants to make attractive arrangement which can spill away from the container but if you want to make a bold statement, you should plant only one plant at its own. When you grow the plants, you will have a full control over which soil that you are going to use and this is important when you live in the place where there is acid, chalk and clay soil. Many plants will not have any problem having to grow in multipurpose compost but if you are planning shrubs or compost, you should use loam based compost.