You've got too many plants in a small space. As they grow, they're going to overwhelm that area. You're going to have to split them, half there and the other half in another area. They actually look pretty good. The pots are the right size but later you might want to put them into 5 buckets. Typically low nitrogen appears as yellowing of the lower leaves and works its way up. If it's been 5 weeks now and you haven't given any ferts, it's probably time to do so. Not too much though, just enough for now to see if it helps. You might consider only watering when the soil looks pretty dry on top. You could get a dissolvable fert that ideally has everything in it, like boron and sulphur, etc., and just put a few drops or granules in a quart of water and see if that helps. They do look a little pale green, which could be another indication that they need some nitrogen. If you want to spend a little more, I always recommend the DynaGro 7-9-5 fert to people. It has pretty much everything plants need. But you can use whatever you want. Just not too much of right now, eh? The DynaGro is just 1/4 to 1/2 tsp in a gallon for soil application.
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