Pluots, Apriums, and the Flavorful World of Hybrid Fruit

Brie Mazurek, Foodwise Staff
July 18, 2024

Once upon a time, there were cherries in the spring, followed by apricots, nectarines, peaches, and plums in the summer, spilling over into fall. Today, stone fruit season brings all of the above and everything in between in a rainbow of colors and flavors: apriums, pluots, nectaplums, peacharines, pluerries, and even peacotums (part peach, part apricot, part plum). Where did these designer breeds come from?

In the age of genetic engineering, the term “hybrid” can raise eyebrows and concerns for eaters. Blossom Bluff Orchards, an organic fruit farm based in Parlier, is one of a number of Ferry Plaza farms who grows pluots and other hybrids, among 100 varieties of stone fruit. “We get a lot of questions at the stand,” says fourth-generation farmer Bryce Loewen. “I think it’s great that people are thinking about GMOs. They’re worried about that stuff, and rightly so in my opinion.” We talked with Bryce to learn more about hybrid fruit.

Family Trees

Hybridization is nothing new, nor was it invented by humans. For thousands of years, new plant varieties have developed in nature through mutation as well as crosses between plants. “A lot of the varieties that have been established for hundreds of years were the result of hybridizing, whether it was prompted by humans or not,” says Bryce.

In classical plant breeding, the fruit breeder collects pollen from one variety with desirable traits and applies it to the blossoms of another variety. If the cross is fruitful, the breeder keeps the seeds and plants them. The seedlings are grown out, and several years later the breeder finds out what traits have prevailed. This type of artificial selection can take place between varieties within the same species (intraspecific) or between closely related species (interspecific). Although classical plant breeding methods have become more technologically complex over the years, the basic concept remains the same.

In contrast, genetic engineering is a modern invention developed in the late 20th century. Genetically modified plants are created in a laboratory using high-tech methods to insert genetic material from one plant or organism into the genes of another plant, creating species that would have almost no chance of occurring in nature.

Some of the earliest experiments in selective plant breeding were conducted around the turn of the 20th century by pioneering horticulturist Luther Burbank, who developed the first plumcot (a 50/50 plum-apricot hybrid) and the Santa Rosa plum, as well as hundreds of other varieties of fruits and vegetables, on his farm in Sebastopol. While the plumcot was too delicate for commercial success, Burbank broke new ground and planted the seeds for breeders to come.

The King of Flavor

In the latter half of the 20th century, aesthetics, durability, and storability guided much of plant breeding, which meant flavor took a back seat. But in recent years, there has been a dramatic shift toward sweetness, due in large part to Floyd Zaiger, a man who is considered by many fruit aficionados to be the modern master of interspecific fruit breeding.

In 1989, Zaiger built on Burbank’s work when, after many years of plant breeding, he introduced and trademarked the pluot, a plum-leaning stone fruit developed by crossing multiple generations of plum-apricot hybrids, and the aprium, another plum-apricot hybrid that tends toward the apricot side of the spectrum. Flavor King and Dapple Dandy pluots bear Zaiger’s trademark, as do many other popular interspecific and intraspecific varieties.

Controlled breeding takes many years of meticulous work, and there is no guarantee that the biological cross will yield the desired fruit. It can take planting thousands of crosses to yield just one new variety with characteristics worth taking to market.

Pushing the envelope of interspecific plant breeding, in 2007 Zaiger patented the Bella Gold peacotum in 2007. A three-way cross, the peacotum combines the sweetness of a peach with a hint of the plum’s tartness, all wrapped in an apricot-like fuzzy skin.

When Blossom Bluff Orchards started bringing peacotums to farmers markets, the fruit were met with curiosity and quickly embraced. “Unlike some pluots, they really stand out,” said Bryce. “They’re very obviously something different, and the flavor is hard to compare.”

Back to Basics

Staying ahead of stone fruit trends is not the only priority at Blossom Bluff, which grows upwards of 100 varieties. The Loewens are always seeking out cultivars that have unique flavor profiles and market demand, while filling in any gaps in their harvest calendar. For example, the Loewens have grow Damson plums, an English subspecies with a long history. Damsons are not the sweetest of stone fruit, but their distinctive blue-purple skin and complex, somewhat astringent flavor have made them a favorite among jam makers.

“We’re constantly looking at new varieties, but we’re also seeking out old ones,” says Bryce. Another example is the classic yellow-fleshed Le Grande nectarine, which was developed near Parlier in the 1940s. “It was a gold standard for nectarines for a long time. We didn’t have that variety, but Mas Masumoto, who’s just down the road from us, gave us scion wood from his trees to graft.”

With temperatures as high to 110°F in the Central Valley, Bryce says harvesting has been especially challenging this season. The humidity also impacts the durability of the fruit, which is picked at peak ripeness for maximum flavor. Among the peaches and nectarines at their Ferry Plaza stand, you can look forward to Flavor Grenade and Flavor Queen pluots this week, Peacotums next weekend, and many more varieties in the months ahead.

Quick Guide to Hybrid Stone Fruit

• Apriums (May-June): Developed by Zaiger, the aprium is a hybrid fruit whose heritage is about 75% apricot and 25% plum. In appearance, it resembles an apricot with its orange skin and flesh and slight fuzziness. In flavor, the aprium is very sweet (due to its higher sugar content) with a hint of plum.
• Plumcots (May-September): The plumcot is one of the original plum-apricot hybrids cultivated by horticulturist Luther Burbank (also known for developing the Santa Rosa plum). Its makeup is 50/50 plum and apricot, generally taking on the appearance of a plum
• Pluots (May-September): The pluot is a hybrid fruit made from a plum and an apricot, with the genetics leaning about three-quarters on the plum side.

Read more in Foodwise’s Farmers Market Guide to Stone Fruit. 

Find Blossom Bluff Orchards at the Ferry Plaza Farmers Market on Saturdays. 

This article was updated from a previously published version.

Topics: Fruit