I personally tried a few times to jumpstart my own sourdough culture, and it all ended in failure. The cultures I have now have been extremely robust (I have le

I personally tried a few times to jumpstart my own sourdough culture, and it all ended in failure. The cultures I have now have been extremely robust (I have left them alone for 2 months, and in 2 days they are back to live as is nothing happened). So I don't know if that is the case, I just know that the cultures I was given worked incredibly well.