Wort For Yeast Starter

Clostridium botulinum is a gram positive spore forming bacteria, and gram positive are the type that hops supposedly suppress. So if adding hop pellets gives you some peace of mind, go for it, but Suigeneris writes “It is unclear whether hops inhibit growth if botulism.” But freezing ought to be sufficient. Reducing pH would also help and you could raise pH when it is time to grow yeast, but that seems fiddly. I like the freezing idea

 

But leave yourself enough headspace for expansion of the liquid