They look to be lacking nutrients. They seem too spindly and pale. Are there drain holes in the bottom of the container? Maybe too much water. Only water when it needs it. Stick your finger down into the soil. It it's wet or damp, don't add any more. When it starts to get dry, then water some. If it's well drained, and not too wet, then I'd add some form of nutrients. Maybe fish emulsion if you are inclined to be organic, or miracle grow for vegetables.
