\begin{tikzpicture}[node distance = 3.5cm, auto]

  \node [start] (start) { Start with Initial Mixture };
  \node [block, right of=start, node distance = 3.2cm] (wait) { Wait\\ \qty{24}{\hour} };
  \node [decision, right of=wait, node distance = 3.2cm] (readycheck) { Ready? };
  \node [block, below of=wait, node distance = 3cm] (feed) { Feed the Mixture };
  \node [decision, right of=feed, node distance = 3.2cm] (limitcheck) { Failed? };
  \node [fail, right of=limitcheck, node distance = 3.2cm] (abort) { Discard All, Start Over };
  \node [success, right of=readycheck, node distance = 3.2cm] (final) { Done };

  \draw [thick, -{Latex}] (start) -- (wait);
  \draw [thick, -{Latex}] (wait) -- (readycheck);
  \draw [thick, -{Latex}] (feed) -- (wait);
  \draw [thick, -{Latex}] (readycheck) -- node { No } (limitcheck);
  \draw [thick, -{Latex}] (limitcheck) -- node (feedok) { No } (feed) ;
  \draw [thick, -{Latex}] (limitcheck) -- node { Yes } (abort);
  \draw [thick, -{Latex}] (readycheck) -- node { Yes } (final);

  \node [below of=feedok, node distance=2.5cm] (details1) [shape=rectangle,draw,fill=white!90!black]{
        \begin{tabular}{c}
	    \fontsize{7}{9}\selectfont For the \emph{Initial Mixture}, mix \qty{50}{\gram} flour/\qty{50}{\gram} water. \\
            \fontsize{7}{9}\selectfont The Mixture is \emph{Ready} when it has \emph{grown}, has \emph{bubbles}, and \emph{smells} vinegary/yoghurty. \\
            \fontsize{7}{9}\selectfont The Mixture has \emph{Failed} when you have fed it too many (eg 10) times without success. \\
	    \fontsize{7}{9}\selectfont To \emph{Feed the Mixture}, discard all but \qty{10}{\gram}, mix in \qty{50}{\gram} flour and \qty{50}{\gram} water.
        \end{tabular}
  
  };
\end{tikzpicture}