|There is a natural solution for cleaning old soil - we think it includes beer, ammonia and coca cola - what is the 4t ingredient?
This will be used for large clay pots of soil, window boxes, etc.
|I am not familiar with such a solution or with the concept of cleaning old soil as an accepted practice. In some cases a commercial grower will pasteurize or will fumigate soil but this is not practical at home.
Container soil usually becomes compacted and depleted within a short time and thus should be replaced, preferably each year. Some gardeners will replace the top portion of the soil or will remove only the lower portion and then work additional fresh material througout the remaining soil.
If you have experienced severe disease problems in those containers, it is best to discard all of the soil, scrub down the containers with a bleach solution (one part household chlorine bleach to nine parts water) and start with all new soil.
I realize this sounds like a lot of work, but good soil is critical to success with plants.