Posted: 24/04/2013 at 22:47
The warmth is the problem, Emma. That's often needed to germinate seeds, but doesn't help after that, except for plants that need it, like tomatoes and peppers. You need to move the turnip seedlings to somewhere with plenty of light, but cooler (must be frost-free while they are young though.) A cold frame would be ideal. If you don't have one, seriously consider buying or making one - they are a real boon.