Abstract
Romanesco cauliflower belongs to Brassicaceae family, commonly known as a unique and visually striking vegetable that belongs to the species Brassica oleracea, Biofertilizers are microbial-based products that enhance nutrient availability to plants it is compatible with long-term sustainable agriculture, they often include beneficial bacteria, fungi, or algae that fix nitrogen, decompose organic matter, and promote plant growth two types of bacteria were used Azotobacter, Bacillus sp. combination from Azotobacter and Bacillus sp. (AB) and (control) without treatment with three replicates using two factors-factorial experiment designs (RCBD)using least significant range (L.S.D) test at probability level of 0.05. These variables comprised analysis of the plant\\'s hight, leaf area, dry matter proportion, relative chlorophyll content, nitrogen, phosphorus, and potassium contents, weight of the flower crown, and overall yield. exhibited a substantial enhancement in the majority of the assessed parameters which significantly excelled in some studied traits (dry matter leaves proportion, relative chlorophyll leaves content, Leafe area 18.79%,58.35 spad,3247cm2 respectively in addition to the percentage, Whight of the flower bud 907. 9gm.plant-1 and Total yield 36. 32kg.ha-1.the results of bi- interaction between the studied factors showed no significant differences in some of the studied characters such plant height, number of leaves and the dry matter for leaves but it recorded significant differences in percentage of (nitrogen, phosphorus and potassium which was estimated (2.545%,0.3147%,3.377%).