Wyeast 3068 traces to the Weihenstephan brewing institute in Bavaria and carries the reputation most drinkers actually mean when they picture "Hefeweizen yeast" — a strain producing both isoamyl acetate (the compound behind its banana ester character) and 4-vinyl guaiacol (the compound behind its clove-like phenolic note), with the balance between the two shifting meaningfully depending on fermentation conditions rather than landing in a fixed ratio every time.
The temperature relationship, more specific than most strains
Across 3068's 64-75°F range, warmer fermentation generally pushes banana ester production up, while the clove-forward phenolic character responds more to the yeast's overall health and fermentation vigour than to temperature alone — meaning two batches fermented at different temperatures with 3068 can land in genuinely different places on the banana-to-clove spectrum, not just "more or less flavour" the way many strains vary. Brewers chasing a specific balance for a competition-style Hefeweizen often experiment deliberately with temperature across more than one batch to find their preferred result with this strain specifically.
Low flocculation, on purpose
3068's low flocculation keeps a Hefeweizen appropriately cloudy without any extra effort — consistent with the style's traditional unfiltered presentation, and a real practical advantage for a brewer who'd otherwise have to fight a more flocculent strain to keep the beer hazy.
Gravity numbers, separate from the ester story
3068's attenuation, 68-75%, is unremarkable by itself — a 1.050 wort at the 71.4% midpoint finishes near 1.014, about 4.7% ABV by the simple formula — and says nothing about where that same batch landed on the banana-to-clove spectrum described above. For the gravity side specifically, the ABV and attenuation calculator confirms an actual batch's real numbers.
Pitch rate and a common mistake
Underpitching 3068 is a well-known way to accidentally push banana ester character even higher than a given fermentation temperature would otherwise produce, since a stressed, under-populated yeast pitch tends toward more ester production generally — brewers wanting to dial banana character down without changing temperature sometimes find a slightly larger pitch does part of that work.
A note on wort composition
Wheat malt's own protein and flavour contribution interacts with 3068's ester and phenol production in ways a simple attenuation number doesn't capture — the same yeast fermented on a lower-wheat-percentage grist tends to read somewhat less "classically Hefeweizen" than the traditional 50%+ wheat malt grist the style calls for, since the malt bill and the yeast strain are both doing real, interacting work toward the finished flavour, rather than the yeast alone fully determining the beer's final character on its own.
The benchmark strain's home styles
Hefeweizen and dunkelweizen are 3068's defining styles, and it remains the benchmark liquid strain most homebrewers compare other wheat-beer yeasts — WB-06, WLP300 — against, precisely because its flavour output is so directly, legibly tied to conditions a brewer actually controls.
A strain worth experimenting with deliberately
Because temperature, pitch rate, and wort composition all move 3068's flavour output in somewhat different directions, it rewards a brewer willing to run the same base recipe more than once with one variable changed at a time — a genuinely useful strain for learning, in a hands-on way, how much control a brewer actually has over ester and phenol balance before assuming a style's character is fixed by the yeast strain alone.