I buy seeds online and it is just a risk I take as not all seeds that I receive yield good results.
I have had many disappointments. I had ordered for the seeds of morning glory in 8 colours and paid quite a bit for them but none came up.
I could say I get just about 30 or 40 percent success from seeds bought online. I have no other choice.
If the seeds are healthy they will end up producing great results such as the zinnia you see here.
Do you buy seeds online?