A field experiment was conducted during Rabi 2025-26 at Agricultural Research Station, Bheemarayanagudi, University of Agricultural Sciences, Raichur, Karnataka, to study the influence of arbuscular mycorrhiza and Pseudomonas fluorescens in combination with different levels of recommended dose of phosphorus on growth and seed yield of sunflower hybrid RSFH-700. The experiment was laid out in Randomized Complete Block Design with ten treatments and three replications. The treatments comprised control RDF, arbuscular mycorrhiza @ 2 kg ha⁻¹, P. fluorescens @ 4 g kg⁻¹ seed and their combinations with 75 and 100 per cent recommended dose of phosphorus. Significant differences were observed among treatments for growth, flowering, yield attributes and seed yield. Treatment T6, consisting of 100 per cent recommended dose of phosphorus + arbuscular mycorrhiza @ 2 kg ha⁻¹, recorded the highest plant height at harvest (136.3 cm), head diameter (17.9 cm), 100-seed weight (7.07 g), total seeds head⁻¹ (828), filled seeds head⁻¹ (736), seed filling (89.00 %), seed yield plant⁻¹ (47.3 g) and seed yield (957.54 kg ha⁻¹). It also recorded the earliest flower bud initiation (50.0 days) and 50 per cent flowering (58.0 days). Treatment T7, comprising 75 per cent recommended dose of phosphorus + P. fluorescens seed treatment @ 4 g kg⁻¹ seed, recorded 134.8 cm plant height, 17.1 cm head diameter, 6.80 g hundred seed weight, 734 total seeds head⁻¹, 643 filled seeds head⁻¹, 87.67 per cent seed filling, 44.6 g seed yield plant⁻¹ and 872.87 kg ha⁻¹ seed yield and was on par with T6 for major growth and yield traits. In contrast, T10, consisting of 100 per cent recommended dose of phosphorus with both microbial inoculants, recorded comparatively lower values for several growth and yield attributes. The results indicated that arbuscular mycorrhiza with full recommended phosphorus or P. fluorescens with 75 per cent recommended phosphorus improved growth and seed yield of sunflower hybrid RSFH-700, with T7 showing potential for reducing phosphorus fertilizer use without compromising major growth and yield performance.