First time gardener! So I bought a hydrangea thinking it's an outdoor plant looking on the instructions for looking after it, it says that it's an indoor plant.First time gardener! So I bought a hydrangea thinking it's an outdoor plant looking on the instructions for looking after it, it says that it's an indoor plant. if I put it in the garden would I flower each year or would it die? Thankyou in advance if anyone can help x