I set the tubes like this. Firstly check the slits are open, if not gently cut. Then fill with compost to first holes. With the bag flat, wrap the roots with stiff plastic or card to reduce the size and, using one hand inside the bag to pull, thread through the holes, then remove the plastic. Fill with compost to next set of holes and repeat to the top. I put a plant in the top as well -leave 1inch approx to allow for watering. Place on a fence post etc do not remove. Dead head seed pods regularly - the display should last from planting - May to Sept. Stunning display when several are used. I do 14 tubes every summer, 4 in the winter. Single colour per tube or mixed. Good with Busy Lizzie in summer and winter pansies.