is there anything i can get from homedepot or lowes to help plants

What do you mean, like fertililzer? If so I would try just a very little at a time since you already have some. There is regular, and some made just for blooming. Be careful. I almost killed my plants once, back when I was growing in dirt, by using too much bloom ferts. Man that was dissapointing. I took 80% of my efforts and just flushed it down the drain.