Wheat (Triticum aestivum L.) is the most important cereal cultivated in organic farming in Austria. Generally the yield potential in organic farming is lower than in conventional systems. The weed field bindweed (Convolvulus arvensis L.) is known to have phenolic acids. These are popular for stimulating growth rate of plants but only at low concentrations. In our study extracts of dried field bindweed shoots were developed, with using distillate water (1:10) or ethanol (1:10) as solvent. Different dilutions of both extracts were made, organic wheat seeds cv, Bio-Capo were “seed primed” in each dilution of the extracts and sown into plastic boxes. After seven days, shoots/roots length and dry weights of the wheat sprouts were measured. The best results for both extracts were observed at a dilution of 1:1024. Both solvents showed similar results. Possibly, the extracts could be used as bioeffectors for organic cultivated wheat. In order to evaluate the positive effect of weed field bindweed, experiments in the green house and on the field are recommended.