lettuce won't grow
Every year my lettuce won't grow. It doesn't die but it doesn't grow either. My garden is in mid-coast maine. I get about 5 hours of direct sunlight a day and have given them compost and fertilizer (10-10-10) + blood meal and some potash. The pH is low (5.5) I've been trying to bring it up but it is happening slowly. Maybe this is the problem? Other things grow well such as tomatoes, radishes, beans, cucumbers,etc. But never any luck with the lettuce. I also water it often so it is not lack of water. Any help?