Do आप need to get back to your brewing Potion at exactly the right time या could आप also finish it e.g. the अगला day?

आप have an घंटा and 20 मिनटों to do part 2 after the gap of 80 या 100 या whatever मिनटों between the two halves. If आप don't start the सेकंड part of the potion within that घंटा and 20 mins, the potion screws up. So no, आप can't leave it for the अगला day.

I can't even find the potion I have brewing at the moment, is that normal if the time's not up?