Compositions and methods are provided for benefiting plant growth. The compositions contain isolated bacterial or fungal strains having properties beneficial to plant growth and development that can provide beneficial growth effects when delivered in a liquid fertilizer in combination with a soil insecticide to plants, seeds, or the soil or other growth medium surrounding the plant or seed. The beneficial growth effects include one or a combination of improved seedling vigor, improved root development, improved plant health, increased plant mass, increased yield, improved appearance, improved resistance to osmotic stress, improved resistance to abiotic stresses, or improved resistance to plant pathogens. The isolated bacterial strains include those of the Bacillus species including species such as Bacillus pumilus, Bacillus licheniformis, and Bacillus subtilis.