compost

Question

I have a horse trough about 16 cu ft full of soilless growing material – 5 cubic feet peat moss, 5 cf vermiculite, 6 cf of compost. After a year my compost breaks down so now I have to mix in 6 cubic feet of compost. For the next year, I would like to keep this system going for many years by just adding 6 cf of good compost every year.

I guess I want something that breaks down quickly and does not have a lot of useless material (residue) in the compost that is not being used. I have several of these water troughs.

Answer 1

Container gardens will need refreshing and new soil and organic material added after each growing season.
An organic compost material is the best way to do so.

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/perlite-potting-soil.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/soilless-growing-mediums.htm
https://www.gardeningknowhow.com/garden-how-to/seeds/soilless-seed-mix-info.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/using-topsoil-and-potting-soil.htm
https://www.gardeningknowhow.com/composting/vermicomposting/worm-castings.htm