kakkoii

For some reason my plants look all wimpy and leggy. what is wrong and what should I do? I just did a trim and they look even worse (typical). They still look bad before trims.

Symptoms: small leaves, spaced out leaves, slight melting on the HM, glosso grows up, has tiny, yellow leaves, and then rots, stemmed plants don't spread. I dosed every fertilizer that the plants needed and still no change. Anymore advice?