 The water-absorbing geocomposite consisting of SAP, geotextile, and internal skeleton is a novel method for superabsorbent polymer and fertilizer application that allows roots to overgrow the geotextile and access water. The experiment aimed to determine the effect of the geocomposite on the growth of container-grown Brunner macrophila when used as a multi-compound fertilizer carrier, compared with soluble and controlled release fertilizers. The geocomposite positively influenced plant traits after 8 and 16 weeks of cultivation, increasing the number of leaves by 42% to 60% and biomass by 260% to 340%. A higher dose and combined use of the geocomposite had a positive effect on all examined traits. This article was authored by Katarzyna Rabowska, Piotr Chohura, Regina Dubix, and others.