The Black Pearl Origins - Notes

The Black Pearl was a deliberate breeding creation — developed through Cornell’s breeding program to meet specific commercial goals.

By the late 1980s, cherry growers in the northeastern United States were facing a specific and frustrating set of problems. The premium dark cherries they wanted to grow — varieties with the bold flavor and deep color that consumers recognized and paid for — were fragile. Rain during harvest caused the fruit to crack and split before it could be picked. 

The industry needed a dark cherry that could withstand all of it — rain, disease, and the rigors of the supply chain — without losing the deep color and rich flavor profile growers and consumers expected from premium dark cherries.

Bob Andersen and Susan Brown at Cornell University's New York State Agricultural Experiment Station took on that problem systematically. Their goals were precise: breed an early-season dark cherry with exceptional firmness, meaningful resistance to rain-induced cracking, tolerance to bacterial canker, and flavor and color quality that could stand alongside the best dark varieties already in production.

To do this, they practiced controlled cross-pollination — the foundational technique of modern fruit breeding. In nature, cherry trees are pollinated randomly by bees carrying pollen between whatever trees happen to be nearby. In a breeding program, that randomness is removed entirely. 

The breeders select two specific parent varieties whose known characteristics they want to combine, then hand-pollinate the flowers of one parent with pollen collected from the other — physically transferring pollen with a fine brush or cotton swab, often covering the flowers beforehand to prevent any accidental pollination by insects. This is what "making the cross" means: the deliberate, hand-controlled union of two specific parents to produce seed with a known and intended genetic combination.

In 1992, Andersen and Brown made that cross — Vernon as one parent, Coral Champagne (a UC Davis selection known for its early ripening and flavor quality) as the other. The resulting seeds were planted and grown into seedlings, each one a genetically unique individual carrying some combination of traits from both parents, most of which would be discarded.

That search took five years. In 1997 a seedling designated NY 8139 was selected from the trials as the one that best delivered on all the program's goals. It was officially introduced to the commercial market around 2008, sixteen years after that first deliberate cross was made in an upstate New York research orchard.

Which Group It Belongs To

The Black Pearl is a sweet cherry — Prunus avium — the same group as the Bing, Rainier, and Sweetheart. It is emphatically a dark cherry, not a blush variety. Its skin ripens to a deep burgundy-black, one of the darkest of any commercially grown sweet cherry, and consistent with the high anthocyanin levels associated with very dark sweet cherries.

The Black Pearl sits closer to the Bing end of the flavor spectrum than anything else — but pushes further into dark fruit territory than even the Bing manages. Its sugar content often reaches around 20 Brix under good growing conditions, placing it in the same general sweetness range as a Bing, but what distinguishes it is intensity and depth. 

The near-black skin signals the high anthocyanin load that gives the fruit its wine-like, dark berry complexity — notes of blackberry and dark plum layered beneath the cherry. Where the Bing is classically bold and the Rainier is honeyed and delicate, the Black Pearl is a wonderful dark expression of sweet cherry flavor.

We find the Bing maintains a remarkably consistent flavor profile year to year.  We are excited to taste the Black Pearl over the next couple of seasons.

Distinctive Characteristics

Color:   Among the darkest cherries in commercial production. Deep burgundy-black skin, red flesh — the darkest of the Pearl Series siblings, whose flesh Cornell describes as red compared to the orange-red flesh of Ebony and Burgundy Pearl.

Firmness:   One of its standout commercial traits. Exceptional firmness with a distinguishable snap that holds up through shipping and storage — a meaningful advantage over more delicate varieties.

Crack resistance:   Specifically bred for it. The Black Pearl tolerates rain during harvest far better than the Bing, which makes it particularly attractive in the Pacific Northwest where weather during the harvest window can be unpredictable.

Early ripening:   Comes in approximately 10 days before Bing — placing it in the same early window as the Early Robin, with the Black Pearl running a few days to a week later depending on the year. This early timing opens the dark cherry season before the Bing.

Tree:   Vigorous, upright, canker resistant, and a heavy producer — though that heavy set can limit individual fruit size if crop load is not carefully managed through pruning. Growers who master that discipline get an outstanding early-season cherry; those who don't get small fruit that undersells its potential.

Brix

The Black Pearl is consistently documented at approximately 20 Brix — reflecting a sugar-dominant soluble solids concentration that places it in the same sweetness range as a well-grown Bing. The Black Pearl with a flavor profile that feels richer and more concentrated because its high anthocyanin and phenolic content is perhaps the creator of layers of complexity that pure sugar measurement cannot capture. A 20 Brix Black Pearl tastes more intense than a 20 Brix Bing, for the same reason a dark red wine tastes more complex than a lighter one at the same alcohol level.

Where It Sits in the Season

The Black Pearl and Early Robin harvest at roughly the same time, with the Black Pearl typically running a few days to a week behind the Early Robin depending on the year. 

Together they introduce the season before the Bing arrives, offering customers the full range of cherry character from the very first weeks.