A guide to American hops

The shift that American hops represented

Compared to the spicy, herbal noble hops covered in our noble hops guide, American hop varieties bred and grown mainly in the Pacific Northwest brought a completely different aromatic family: citrus, pine, resin and, more recently, tropical fruit. That shift, starting with hops like Cascade in the 1970s and accelerating through the following decades, gave American pale ales and IPAs a flavour identity distinct from anything European brewing had produced before.

Cascade and Centennial: the founding pair

Cascade, moderate alpha acid around 5 to 7 percent, carries grapefruit and floral notes and remains the hop most associated with the American pale ale style. Centennial, sometimes called super Cascade for its similar but more intense profile, runs a higher alpha acid, typically 9 to 11.5 percent, and works well for both bittering and aroma in the same recipe.

Citra and Simcoe: the modern IPA backbone

Citra, high alpha at 11 to 13 percent, brings intense tropical fruit, mango, passionfruit and citrus that became closely associated with the modern hazy and West Coast IPA styles alike. Simcoe pairs passionfruit and pine in a single hop at a similarly high alpha acid, and is frequently used alongside Citra to add a resinous backbone under the tropical fruit character.

Chinook and Columbus: the resinous, high alpha end

Chinook, around 12 to 14 percent alpha acid, leans piney and slightly spicy, and is a common efficient bittering choice that also works late in the boil for a more resinous aroma. Columbus (also sold as CTZ, alongside the closely related Tomahawk and Zeus), at 14 to 17 percent alpha acid, is among the highest alpha hops commonly available and is prized for efficient bittering as much as for its pungent, slightly garlicky-herbal aroma in late additions.

Choosing among them for a recipe

Start from the flavour profile wanted, citrus and floral for Cascade or Centennial, tropical fruit for Citra or Simcoe, resinous and piney for Chinook, rather than from alpha acid percentage alone, since alpha acid only tells you about bitterness efficiency, not aroma character. Many modern American IPAs blend two or three of these hops specifically because each contributes a different part of the aroma that no single variety covers on its own, a lesson worth testing against the pellet versus whole cone question once you have settled on which varieties to use.

The dual-purpose hops worth knowing

Several American varieties beyond the core five sit comfortably at both bittering and aroma duty. Amarillo, moderate alpha with a strong orange and citrus character, works well as a late addition star on its own. Mosaic, high alpha with an unusually broad aroma spanning berry, citrus and pine in a single hop, has become one of the most widely used aroma hops in modern American craft brewing precisely because it delivers a complex profile most single hops cannot manage alone.

Reading an American hop's harvest data

Because alpha acid varies by harvest, serious suppliers publish a lot-specific analysis alongside standard American hops, including alpha acid, beta acid and sometimes a cohumulone percentage. A lower cohumulone percentage within the same variety generally reads as smoother, less harsh bitterness, which is worth checking if two lots of the same hop are behaving noticeably differently in otherwise identical recipes.

It is worth remembering that many of these varieties are proprietary or trademarked, and a supplier's own branded hop, sold under a unique name, may be a close relative or even a renamed version of an established variety bred for a slightly different growing region. Checking a supplier's stated parentage or lineage, when available, helps avoid paying a premium for what is essentially a familiar hop under new packaging.

Growing conditions shift a hop's exact aroma profile from one harvest and growing region to the next, even within the same named variety, which is why two batches of what is nominally the same hop can smell noticeably different. This is normal and expected, and it is part of why experienced brewers taste and smell a fresh sample before finalising a hop schedule rather than relying purely on the variety name.

If you are new to this family, start with a single-hop pale ale using just Cascade or Centennial before combining several varieties in one recipe. Learning what one hop alone contributes makes it much easier to judge what a blend of two or three is actually adding on top of that baseline.

Common questions

What is the most classic American pale ale hop?

Cascade, with its grapefruit and floral character, remains the hop most closely identified with the original American pale ale style.

Why do modern IPAs often list three or four hop varieties?

Because each hop tends to contribute a different aroma family, citrus, tropical fruit, pine, and blending them produces a more layered aroma than any single variety alone.

Is a higher alpha acid hop always more pungent in aroma?

No. Alpha acid percentage measures bittering potential, not aroma intensity, which depends on the hop's oil composition rather than its alpha acid content.