cant see the pic too well coz im on my phone (small screen) but it looks very stretched and nute burnt, what age is the plant? That size of plant wont need feeding and not knowing what the soil composition is and its ph and conductivity values(how much food is in the soil already) isnt helping anything, next time get some good quality organic pre fertilised soil/compost(not miracle grow or anything time/slow release feed) start off in a small pot 3or4 inch is great half perlite half soil the perlite will dilute the pre fert soil as theyre normally too strong for seedlings and cuts, then and only when the plant starts to look hungry(yellowing lower leaves) or when the seedling has rooted out the pot(lots of roots showing at pots drainage holes) "pot up" into a pot twice the size using the neat pre fert soil, your seedling will be big enough and have enough roots to deal with the strong soil by now. This will feed yr plant fine for the next 2-3weeks, and depending how long u plan on vegging for u can do this again into larger pots for another 2-3weeks, then by the time yr ready to flower yr plant will have depleted the soils nutrient reserves and u can start yr feeding schedule without burning yr plants.