Here's something that's been bothering me as a gearing up grower. I plan to grow in Promix, and to my understanding it's not recommended that you re-use. I have no problems with this. But where, as an apartment grower, does one dispose of 10 gallons of used promix at a time?
no soil has left my garden in 5+ yrs.... every bit of it is recycled.... But i also grow organic so there is not much buildup in the soil....
If you throw out soil you are just throwing away your money... You can make it better every time
Salts are a common and natural constituent of all soils. Normally, these salts are present in low amounts in topsoil and plant growth is not affected. Accumulation of salts, through natural means or man's activities, can cause plant growth problems and result in poor growth or death of plants.
Salts can accumulate to high levels in field soils that are located in low lying and poorly drained areas. A white saltcrust on the soil surface often becomes evident when these soils dry out. Avoid purchasing topsoil from such areas for use in the garden or flower bed.
Salts can also accumulate in soil through improper care and management practices. Excessive fertilization or watering with high salt-containing waters are two of the most common ways of causing or aggravating an existing salt problem in soil. Analyze the salt content of well water before using it as an irrigation water source. It is also possible to induce a salinity problem through very heavy additions of soil amendments that have high salt content, e.g., manure, gypsum.
Salts are a permanent constituent of soil. Once the salts have accumulated in a soil, there is no chemical treatment that will remove or counteract their adverse effects on plant growth. Special management practices become necessary in order to successfully grow plants on soils with high salt content.