You know how much conditioning I have most of my novice trainees do? None.
For people beyond the novice phase, conditioning should generally be done after your lifting, but you are trying to do too many things at once. Six days of rowing plus three days of Starting Strength is too much to recover from when the weights get heavy. You are probably going to have prioritize one of these things over the other. Either you are going to see the Starting Strength progression out to its end, or you are going to do your full rowing program. The demands from both of these programs when run at the same time will guarantee substandard results from both. So, what do you want to do?