<font size="3">'''Raw Ingredients / Preparation</font>
The Royal Decrees of May 20, 1965 and March 31, 1993 required that lambic brewers use at least 30% wheat.<ref name=“GeuzeKriek”>Jef Van den Steen, [[Books#Geuze & Kriek: The Secret of Lambic Beer|Geuze & Kriek: The Secret of Lambic Beer]], 2012</ref> Today's modern lambic is brewed using a grain bill of roughly 30-40% raw (ungerminated) wheat and 60-70% malted barley (2-row or a combination of 2-row and 6-row). Recipes discovered from the 1800s actually called for even more unmalted wheat.<ref name=LambicInfoConvo>Lambic.Info Interview with Jean Van Roy and Jean Pierre Van Roy, May 2015</ref> In most cases, both the wheat and the barley are coming from Belgian or German farms. The goal is to create wort that is rich in protein, amino acids and dextrins in order to provide nourishment to the microorganisms for months and years of fermentation.
Aged hops also play an important role in lambic. Hops are necessary because of their bacteriostatic properties and to curb the growth of bacteria. This is why hops over a year old are used; they have lost the majority of their bittering properties but not their bacteriostatic properties.<ref name=PalmBoon>Boon Brewery, Brewing Process http://palmbreweries.com/en/boon</ref> Traditionally, hops containing low amounts of alpha acids are aged for anywhere between a year and three years; although some bales of hops wind up aging much longer. The hops are typically stored in an environment where they are susceptible to drastic temperature changes, such as an attic.