I am starting off sprout and leek seedlings but I don't know where I will be able to put them once I transplant. I have a few choices available, which sounds like the best place (because I am trying to crop rotate but it is not always 100% possible):
Next to the root veg (carrot, parsnip, beet, fennel)
or
Next to the tomatoes
or
In the place where some early potatoes have been.
Any suggestions?