To give those seedlings and young plants the best possible start this 2 in 1 sieve will produce the soil with the necessary space and air in which to establish the strong root systems for them to thrivean essential piece of potting shed equipment the sieve is highly practical it is designed to give two grades of tilth it is 12cm deep and has interchangeable screens to meet the gardeners needs in propagation and planting out one screen has a 12mm hole size for sifting out stones weeds and