Grow your own hops with a rhizome root stock.
Magnum hops are a high alph acid (11-16%) German variety hop known for its smooth clean bitterness. Useful in continental lagers, pale ales, and IPAs. This variety of Magnum is cultivated in the U.S.
Magnum hops are one of the recomendated hops for beginner growers. The other recommended hops for beginners are Cascade and Nugget.