Pure cultures of nitrogen fixing partner bacteria have been used in agriculture for more than 100 years. Recent improvements in genetic screening techniques are now allowing researchers to find the strains that offer a competitive edge. It is now possible to find the optimum strains which are highly competitive at nodule occupancy and fix much more nitrogen than the backgound population. In addition to this increased nitrogen supply there are microbiological partners that can be co-formulated with the rhizobial bacteria to solubilise phosphate, stimulate germination and early root growth and even combat certain seedling diseases. In tough commercial conditions growers look to optimise their crop performance and evaluating the increasing number of beneficial plant health products is difficult. We are currently trialing several of these beneficial products in co-formulated products to give a ‘package’ that helps seedling establishment along with improved nitrogen supply.