I am working on a third yeast pack, which has not grown for me. The first two didnt even swell (I didnt bother pitching the second one), this third yeast pack Wyeast Lager, dont remember which. Well this last one swelled quiet well, I thought the packet might explode. So after 4 hours I pitched it to a starter, with DME after a boil. I then left it at about 65-70 degrees and noted very little activity for 3 days. Then I moved it to a slightly warmer spot and continued with little to no activity. So I aerated and shook the starter and poured it in my carboy. Well almost a week later in the fridge, there has been no activity. Any suggestions.
I have done other lagers in the winter months (up north) but this is the first one in summer in the fridge.