INTRODUCTION
The fact that the greenhouse has got fertigation equipment allows for taking advantage of various materials as substrata. These can be organic, mineral, or synthetic materials, manufactured as substrata, as well as various types of waste, most often prepared in the form of mixtures. Fertigation, i.e. watering and feeding of the cultivated plants, works automatically. The plants are fed 8–14 times a day, and therefore they are optimally nurtured throughout their vegetation period.