* Naturally: Auxins are naturally produced by plants, primarily in the shoot apical meristem (the growing tip of a plant). They are essential for plant growth and development, playing a role in processes like cell elongation, root formation, and fruit development.

* In a laboratory: Auxins can also be synthesized in a lab using various chemical processes. These synthetic auxins are often used in agriculture and horticulture for applications like:

* Promoting root growth: To help with the propagation of plants from cuttings or seeds.

* Controlling weed growth: To eliminate unwanted plants.

* Controlling fruit development: To promote fruit ripening or prevent fruit drop.

* Thinning fruit: To increase the size and quality of remaining fruit.

So, while plants make their own auxins naturally, humans can also create them in a controlled environment.