Hop Querie

[GF21]

Hi All
Im doing a lager recipe over the weekend , I studied the recipe but noticed the hop additions , the recipe calls for tettnanger alpha 2.1 , but all i can source is tettnanger 4.1. my querie is , can i halve the amount of 4.1 to come more or less close to the recipe or is that too easy , any help appreciated folks

 

[6Trails]

Hi All
Im doing a lager recipe over the weekend , I studied the recipe but noticed the hop additions , the recipe calls for tettnanger alpha 2.1 , but all i can source is tettnanger 4.1. my querie is , can i halve the amount of 4.1 to come more or less close to the recipe or is that too easy , any help appreciated folks

Just to check myself I put an addition into Brewfather at a few different times with those numbers, and yes they all came out at very close to 50% of the IBU number for the 2.1 vs the 4.1