Athosanswered grow question 6 years ago You give us no information with which to work with. Anyway, that is not a nutrient deficiency. A plant that young should not be fed. It does look like a pH issue, get a pH meter, meassure your water and adjust accordingly: 6.5 is ideal for soil, but keeping it between 6.0 and 7.0 is fine. Don't think of giving nutes, let the plant feed itself from the soil and then, trasplant to a bigger pot. In case you care, LED bulbs are much better at growing weed than CFL.