slow grow seedling lower leaves yellowing

bongman10

Member
hello my seedlings about 3 week giv or take its about an inch tall with 2 proper sets of sun leaves and the third just coming through its been really slow growing but now the first jagged leaves are yellowing with brown tips quite bad and a few of the sun leaves have a slight yellow and brown tip but only a little bit. i give the plant a 1/4 of a 1/2 recomended dose to try n speed it up about a week and half ago. i dont know if this has caused it but it looks light maybe a defiency because of the way the plants growin ok yet the older leaves are dyin slowly any advice anyone??? thanks
 
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