I can't find much information on this, if any. Lingonberries aren't the most exciting thing ever. :r
Anyway, hello, I am Jon! I am in zone 6B where the summers and the winters hate you and your garden. Fun times!
Earlier this year in March, I planted two Koralle lingonberry bushes in a little hanging planter with some Strawberry mint (probably not the best idea, spatially), and to my dismay, one bush is starting to turn yellow, and the second, healthier one looks to be going down the same route.
Not yet dumb bush
I'm growing them in Miracle Gro moisture control soil, but if I remember correctly, I might have better luck in acidic, lower-grade soils. Don't quote me on that, I might wrong, but I know they like acidic soil, so I added some sulfur granules.
This is the second time I've tried growing lingonberries, away from mowers, after first trying with the Ida and Balsgard varieties. Any advice is welcome, including adding more acid to the soil if that's what it takes!