Plant hormones regulate many aspects of plant growth and development. Both auxin and cytokinin have been known for a long time to act either synergistically or antagonistically to control several significant developmental processes.

The ratio of auxin to cytokinin plays an important role in the effect of cytokinin on plant growth. Cytokinin alone has no effect on parenchyma cells. When cultured with auxin but no cytokinin, they grow large but do not divide. When cytokinin is added, the cells expand and differentiate. When cytokinin and auxin are present in equal levels, the parenchyma cells form an undifferentiated callus. More cytokinin induces growth of shoot buds, while more auxin induces root formation

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You may visit to http://www.cannagardening.com/plant_hormones and get sufficient information about the role of hormones in plant growth and development. The main question is for what purpose you are going to use this solution? Is there any problem with your garden plants such as any kind of biotic or abiotic stress (abnormal plant growth)? Some plant hormones help plants adapt to changing environments, by mediating plant growth and development, nutrient allocation and source/sink transitions. Cross talk between different plant hormones results in synergetic/antagonic interactions that are crucial in determining plant responses to abiotic stress. Indole acetic acid, a naturally occurring auxin, has been successfully used to improve many cash crops. It enhances sucrose concentration by stimulating the photo-assimilate transport to and within the developing wheat grains, and confers tolerance to plants against water and salt stress. Cytokinins also plays an important role in mediating the stress response.