Common belief tells that bacteria are sources of illnesses for living organisms. That is not true for plants, which can benfit from the help of small friends in the form of bacteria. For instance the root-friendly Azospirillum bacteria enhance the growth and adaptation of plants. Agronomists Tkachenko et al. show that the cultivation of baby plants with the Azospirillum brasilense bacterial species improve potato growth, development, and survival in the field, leading to an increase of 45% of tuber yield, on the average.