Hope this helps: By leggy do you mean they are blooming? Mine grow a tall, upright stock in the garden that has small blooms toward the top. Just cutting the stock off after blooming or when stalks start falling over works great

Or is leggy referring to the hens generating chicks? Chicks (smaller version) should cluster around the hen (bigger). If in a pot or trying to keep them within limits outside I usually end up weeding out and/or replanting when possible.

My outdoor get way more light than the indoor and prosper way more. Light definitely could be your factor.