Tires are excellent containers for semps. Cut one rim off. Half sand half leaf mould for media with zeolites, rock dust and soak with a humate solution new plants. The cut rim goes under the tire. Staple ground cloth to it on the top of the inverted rim under the tire. This will prevent invasions from stoloniferous plants. It also allows you to place these containers on bare ground. Use a weed wacker to keep them trim around them and preventing grass seed from blowing in. You can take a car tire and have it completely full of semps by the end of one growing season. They like the crowding. Spacing them initially 3 semp starter diameters apart across the tire. If you have less than this. Pinch off the pups and continue spacing them across the tire as they reproduce. The result by the end of the growing season will be a uniform size in all represented varieties from start to finish. Including the original plants. Since car tires are ergonomic for use it makes perfect sense to use them. You can manage hundreds in this capacity, easily. One variety to a tire. They will grow faster. You can cover the top of the planting with a light colored sand to keep light reflecting off of the surface during the growing season. The bottom rim uncut in the tire will catch rain water. They will winter without protection in this format and not rot off. Do you want to know what to cut the rim with?
