My mom is planting some Mustard Greens in our backyard. We have been growing and eating it for years. The problem is that the Mustard Greens are very small. I don't know what type of fertilizer my mom uses but all I know is the kind she uses is not working and she is complaining. We wasted so much water on it and it just doesn't grow any bigger. She planted the Mustard Greens on September 1, 2006.
To be honest, I don't know what type of Mustard Greens I have, maybe you guys/gals can take a look at the pictures below and tell me what kind I have. I'm thinking it looks like Japanese Mustard Greens? Or regular Mustard Greens?
What my mom wants is BIG Mustard Greens. So what type of fertilizer/ingredients should I buy for her?
My cousins grow it too and theirs is very big, but they don't tell us what kind of fertilizer or ingredients they use

Anyway, here is a few screen shots of my moms Mustard Greens:
As you can see from the pictures, it is very small.
https://img163.imageshack.us/img163/2623/picture001ns8.jpg
https://img119.imageshack.us/img119/8184/picture002bh8.jpg
https://img426.imageshack.us/img426/9104/picture003rf0.jpg