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Abstract Irrigated Australian cotton ( Gossypium hirsutum L.) is primarily produced on Vertosols, which are susceptible to waterlogging due to their highwater retention capacity and poor drainage. Waterlogging inhibits root growth and depletes soil oxygen, resulting in changes to soil pH, redox, and nutrient availability. Australian cotton farmers often apply foliar nutrient sprays to counteract the adverse effects of flooding on cotton crop development, aiming to boost otherwise suboptimal lint production. During the 2021–2022 growing season, a natural riverine flooding event presented an opportunity to evaluate the impact of foliar nutrient applications on waterlogged field‐grown cotton. Foliar application treatments were as follows: T1 (control with distilled water), T2 (urea ammonium nitrate at 0.5 L/ha), T3 (monoammonium phosphate at 0.25 kg/ha), T4 (zinc sulfate at 0.8 kg/ha), and T5 (a commercial multi‐nutrient blend of N, P, K, Ca, Mg, S, Cu, Mn, Fe, Zn, B, Co, and Mo at 5 L/ha). Treatment effects were assessed by measuring peak crop biomass, normalized difference vegetation index, ground cover, crop disease incidence, lint yield, and fiber quality. Foliar application treatments did not improve any of these parameters ( p < 0.05). The mean lint yield was 2474 kg lint/ha (10.9 bales/ha). Disease incidence was uniformly high (38% of plants) due to the prevailing seasonal conditions. While this single season real‐world study does not account for potential year‐to‐year variability, the post‐flooding application of foliar nutrients may not always boost vegetative cotton growth and subsequent lint production.