on a fact sheet of THE ohio state university horticulture and crop science department, i found the time frame for my blueberries - "Blueberry plants begin to produce fruit in the third season; however, they do not become fully productive for about six years." i think my twigs are a year old already. so two years to go.
apparently i am also supposed to monitor the pH of the soil, as they require acidity to be productive. soil pH should be in the range of 4 to 4.5 and have 4 to 7% organic matter or more.
i hope we don't decide to move before i get my berries!