Well, do you have the cup in a drip system right now or is it just sitting in a cup full of hydroton? All plants are worth saving as long as it isn't yellowed too bad. Right now at its stage you just need to make sure its well watered with ph balanced water and its under 24/7 lighting. That thing will start to grow more aggressively if you keep it well watered... I know that hydroton doesn't store water at all but is great for drip style grows. Tell me what your setup is and we can go from there. Just keep that bad boy or hopefully girl under lots of light and you can get away with a fluorescent lamp for now but when it gets bigger your best best will be an hid lamp. Hope this helps!