Yes, and no.. yes in that pH needs adjustment, no in that it requires more to adjust it. Average pH of peat moss is 4.3-4.5.. if you're speaking canna coco soiless .. it'd be sitting about 5.9-6.1 Both would need a little bit of adjusting.. the peat much more to get it within a range that it's not going to cause you a massive headache, and add chaos in terms of the plants. That said, you'd want to use pH up to get it in range and not lock nutes out of the plant until it's in said range - that'd be a bad idea all the way around to just bank on the water magically fixing it that jump.
My .02,
Fi-