No. The southern tariff on imported cotton manufactures was 15%. I looked up the southern tariff schedule, BTW. It taxed 431 import articles. 12 of those articles were at 25% - the highest rate in the confederate tariff. The remainder were 10% and 15% with an average overall rate of 13.3%. That made the confederate tariff one of the lowest for any nation in the world at the time. It was also lower than the 1857 US tariff, which had been considered the friendliest free-trade tariff in half a century. Here's the link for the data. It's a .pdf so I can't cut and paste, but go to the table on the last page and read the figures on what the south actually imported and how the Confederates set their tariffs. They were every bit as protectionist as the US tariffs of 1857 were.