Ahtanum T90 Finishing Hops 100g

Ahtanum is sweet and peppery with a piney-citrus aspect. Warmly aromatic and moderately bittering, Ahtanum is a hop of distinction.

It is often likened to Cascade though without going that far, it makes more sense to say that Cascade may be an acceptable substitute.
In comparison, Ahtanum is less bitter, its alpha acids are lower and its grapefruit essence is significantly more pronounced.
It really is more akin to Willamette, with its notes of lemon and grapefruit.

Used for: India Pale Ale, Pale Ale, Heffeweisen, American Ales, Lagers, Californian Common, Bitters