Did you know that you can propagate your own plants? And you don't need a lot of experience to do it either One of the easiest plants to propagate is hydrangeas.
You can study more on how to do it here: How To Propagate Hydrangeas | Propagating Hydrangeas
It's pretty easy to root your own plants like hydrangea. You should give it a try and maybe you can grow your own plants and then sell some to make some extra money. Have you ever started your own plants from cuttings?
