Vertical Farming is can also be considered as a next step to hydroponic technique. Vertical Farming is a method of cultivating vegetables etc. on the tools / equipment’s stacked in the vertical way.
You will get more idea by seeing below picture,
The structure required to build such things can also look like as below,
If you are looking for such structures to try vertical farming at your home, you can contact business’s listed on website at http://www.greenecosystem.in/fconn/search.html?search=vertical
Hope this will help, Do let us know if you need any more information.