[hubballi]

I have a raised bed on stilts with compost in which I planted some cos and red lettuce. I feed with seaweed but apart from not really growing much, the outside leaves of the cos start to yellow and die. Some have just rotted to the core. I pull them of and the next layers go the same way. While I am at it, the newly planted rocket and spinach have bolted already. I keep the spinnach in the shaded area of the bed but it still doesn't seem to like it.

[Yorkie]

Could you be overwatering?

Is it possible that you're overfeeding?  I don't think most salad leaves like too much fertiliser - too much nitrogen and they can be too sappy?  Spinach may be an exception to this as it has a longer period?

[sclarke624]

My newly planted rocket and spicey leaves bolted as well, I'm sure I only did them three weeks ago.  Pain isn't it.  Some of my lettuce has done the same as yours as well.  I didn't know they don't like too much fertiliser, that could be my problem.

[peapod]

Theyre pretty easy plants to grow and can be usually left to get on with it, my first thoughts were over feeding too