Mike-
One pass ought to do it for most gardening. I don't care to change implements so I have acquired three cultivators over the past couple of years. One is set up for hilling, another for running the furrow, and one for cultivating between rows later in the season. I'm now trying to dedicate a tractor to each implement so all I have to do is jump off one and onto another. Unless you are trying for massive hills I see no reason one pass per row wouldn't work. Also, IMHO, the higher the hill the faster it will dry so that's another reason. I know people that don't hill rows at all for that reason. They just plant at ground level. Things like potatoes need the hilling for proper growth but most veggies will do fine in a small hill.
One pass ought to do it for most gardening. I don't care to change implements so I have acquired three cultivators over the past couple of years. One is set up for hilling, another for running the furrow, and one for cultivating between rows later in the season. I'm now trying to dedicate a tractor to each implement so all I have to do is jump off one and onto another. Unless you are trying for massive hills I see no reason one pass per row wouldn't work. Also, IMHO, the higher the hill the faster it will dry so that's another reason. I know people that don't hill rows at all for that reason. They just plant at ground level. Things like potatoes need the hilling for proper growth but most veggies will do fine in a small hill.