Bobek is one of the older traditional cultivars grown in Slovenia's Savinja Valley, predating the international export prominence Styrian Golding later achieved from the same growing region. It remains in cultivation today largely for domestic Slovenian brewing and among growers maintaining the valley's older varietal diversity rather than as a major international export hop.
At 5-8% alpha acid, Bobek runs a touch higher than Celeia or Styrian Golding, with a fruity and mild spice aroma that reads somewhat less restrained than the more purely herbal-spicy character of its better-known regional siblings. That slightly fuller, fruitier profile gives it a genuine dual-purpose capability within traditional Slovenian brewing, where it's sometimes chosen specifically over Styrian Golding for beers wanting a bit more body to the hop character rather than the more restrained spice of its better-known, more widely exported regional sibling. Bobek's essential oil content swings unusually widely by crop year, published across roughly 0.7 to 4.0 mL per 100g of dry matter, so the fuller, fruitier character described here can read noticeably lighter or heavier from one harvest to the next.
Styrian Golding is the closest regional substitute for general character, while Fuggle offers a related fruity-earthy alternative from an entirely different growing tradition, sharing more in common with Bobek's fuller fruitiness than a purer, more restrained noble hop like Saaz ever would. Traditional Slovenian ales and some Central European lager styles use Bobek. Its alpha ceiling runs above both Styrian Golding's and Fuggle's, the clearest numeric sign that it carries more real bittering capacity than either gentler regional hop it's usually compared against.