The short take is that two berries make a boysenberry is a myth. The real story has four parent plants in the mix. Your boysenberry has roots in four plants. The boysenberry parentage links to four berry crops, not two.
I learned this fact when I read up on Rudolph Boysen's old farm notes years ago. The man bred his cross in the 1920s in Anaheim. Most folks ask which two berries went in. You may have asked the same thing. The answer hides a rich tale of four parent species, not just a pair. So when you bite into your next boysenberry, you taste four lines of fruit at once.
Here is the breakdown of each parent plant in the boysenberry hybrid:
European Raspberry (Rubus idaeus)
- Flavor gift: The raspberry parent gives the boysenberry its sweet floral top notes and that classic red fruit smell.
- Texture gift: Raspberry passes on soft drupelets and a hollow core that bursts on your tongue.
- Origin: This species grows wild from Europe to Asia and is the base of most red bramble crops we eat today.
European Blackberry
- Flavor gift: The blackberry adds deep dark fruit notes and rich purple hues that mark a ripe boysenberry.
- Texture gift: Blackberry brings firmer cell walls and a meaty bite to the hybrid.
- Color: This parent gives boysenberries their dark maroon black look when fully ripe.
American Dewberry (Rubus ursinus)
- Flavor gift: The dewberry brings a wild tangy bite that no other parent can match.
- Texture gift: Dewberry adds a slight chew and a wine like aroma to ripe fruit.
- Origin: This trailing bramble grows wild across the West Coast of North America.
American Loganberry
- Flavor gift: The loganberry is itself a raspberry blackberry cross, so it doubles down on both flavors.
- Texture gift: Loganberry gives the boysenberry its long oval shape and large size.
- History: James Logan bred this hybrid in 1881 in Santa Cruz, California, by chance in his own yard.
The loganberry is the key here. The loganberry is a raspberry blackberry cross on its own. So your boysenberry gets double doses of those two flavors. Then it adds the wild dewberry zing on top of that mix. The flavor stack is what gives the fruit its complex taste.
The boysenberry origin story has a twist that few folks know today. Rudolph Boysen's farm failed and the cross got lost in weeds. Walter Knott found the few plants that lived in 1932 and saved the line. We owe each boysenberry today to that one rescue. I think it is the best fruit save story in U.S. farm history.
Want to taste the heritage of this fruit yourself? When I first tried this side by side test, my eyes lit up. You should buy a small pint of fresh raspberry, blackberry, and boysenberry at the farmers market. Set them on a plate side by side. Eat one of each in a row. You will pick up the bright raspberry top note. Then the deep blackberry base. Then the wild dewberry tang in the boysenberry. Your taste buds will map out the whole family tree in one bite. Try this test with friends to make it more fun.
Read the full article: Boysenberry Plant Growing Guide
