This study was carried out on cantaloupe plants (Cucumis melo L. cv ‘Gal152' (during the winter growing seasons of 2019-2020 and 2020-2021 at a private vegetable farm located on Abo El-Dahab region, Abo-Khalifa vallage, Ismailia Governorate, Egypt. The seedlings at age of 17 days were transplanted on 25^th December in mulched low plastic tunnels under sandy soil conditions to study the treatments which were combinations among three soil applications of 80 units of K₂SO₄ doses rates (100%, 75%, and 50%of recommended potassium requirements) and spraying four foliar potassium sources (Potassium Silicate, K-Sili; Potassium Citrate, K-Citr.; Potassium Acetate, K-Acet.; Potassium Thiosulphate, K-Thio.; and water spray as control) on cantaloupe. So, this study included fifteen treatments. The highest-grade A yield value was recorded by each of T_100%× k-Citr treatment without significant differences followed by T_75%× k-Citr, T_100%× K-Sili, T_100%×without spray, and T_75%× without spraying treatments in the second season. The highest marketable yield value was recorded by each of T_50%× k-Acet treatment, without significant differences than T_50% × K-Sili and T_100% × without K-spray in first season and T_100% × without K-spray, T₇₅ × k-Acet, T_50% × k-Thio, and T_50% × k-Citr treatments in second season. The highest total yield was recorded by the treatment of T_100% × without k- spray (2.48kg/m², 10.42 ton. /fed.) and T_50% × K-Sil without significant differences between them in first season, while in second season, the highest total yield was recorded by the treatment of T_100% × without k- spray (2.80 kg/m²,11.76 ton./fed.)  T_50% × k-Acetate; T_50% × K-Sili; and T_75% × k-Acet  without significant between them.