Kombucha.com Wildberry Marmalade Brew Booster - Elderberry, Currant and Strawberry Blend with Hibiscus, 8 Ounce Review (2026)

What this product actually is

Wildberry Marmalade Brew Booster is sold by Kombucha.com under the Raw Brewing Co. brand and comes as loose botanicals rather than a liquid concentrate. According to the ingredient list on the maker's own product page, the blend is built from hibiscus, elderberries, currants, rosehips, natural flavor, strawberry crispies made from glucose syrup, strawberry, beet sugar and starch, and mango pieces with sugar and citric acid. The 8 ounce size sits between the smaller 4 ounce bag and the bulk 5 and 10 pound options the brand also sells, which makes it a middle option for someone brewing kombucha regularly but not at a commercial scale. It is caffeine free and uses no artificial flavors, matching the all natural positioning on the label.

How it is meant to be used

The maker's instructions describe steeping this blend after primary fermentation rather than during it. The steps are to place the desired amount in a muslin bag or tea ball, add it to the finished kombucha, and refrigerate for anywhere from 4 to more than 72 hours depending on how strong a flavor is wanted, then remove the bag or strain the botanicals out before bottling for a second fermentation if carbonation is the goal. The product page specifically notes that using it during the first, primary fermentation is not recommended, and that any scoby or starter liquid needed for the next batch should be set aside before the booster goes in, since the fruit and hibiscus are not meant to sit with the culture long term.

Flavor profile and what to expect

The named ingredients point to a sweet, fruit-forward result rather than a tart or dry one. Elderberry, currant and strawberry supply the jammy backbone the product name promises, while hibiscus is the ingredient most responsible for turning a batch a deep red color once it has steeped. Rosehips and mango round out the blend with additional fruit character. Because the strawberry component includes added sugar in the form of glucose syrup and beet sugar, the finished kombucha will read sweeter than a plain second ferment, which is useful for masking excess sourness in an over-fermented batch but works against anyone who prefers a drier, more vinegary kombucha style.

Practical considerations before buying

Since the blend is loose botanicals rather than a syrup, a muslin bag, tea ball or fine strainer is effectively required gear to keep berry pieces and hibiscus calyces out of the finished bottle. The steeping window is wide, from a few hours to several days in the fridge, so timing a batch takes some planning compared to a quick pour-and-bottle syrup. Buyers should also budget for straining time before bottling, since unstrained botanicals left in a swing-top bottle can clog the neck or continue affecting flavor. The 8 ounce size is a reasonable middle ground for someone brewing every week or two, though very frequent brewers may find the bulk pound bags a better value over time.

Bottom line

This is a straightforward way to flavor kombucha without formulating a fruit blend from scratch, and the ingredient list backs up the marketing claim of an all natural, caffeine free booster with no artificial flavors. It suits home brewers who already have a working scoby routine and want a reliable, sweet, hibiscus-red batch for gifting or regular drinking. Anyone brewing dry, low sugar kombucha, or anyone who dislikes straining loose botanicals out of a finished brew, should look at a liquid flavor concentrate instead. Within its niche of steep-in fruit boosters, the ingredient transparency and clear usage instructions make it a dependable pick.

Frequently asked questions