It is because organic nourishments frequently contain plant nutrients at low concentrations. These nutrients must be converted into inorganic forms by fungi and soil bacteria before houseplants can use them. This process slows their release, especially during the winter when soil microorganisms are less active.
Still, organic nourishments come with many advantages. They do not leave a crust on the soil like certain inorganic types. They also last longer and can continue to nourish your garden for months. Plus, they provide food for beneficial bacteria, making it simpler to work the soil.