Lemon AK auto, indoor organic

If new growth is fine it's nothing to worry about. The first leaves can sometimes show a slight defeciency. I think it's just the seedling adjusting to the soil pH . It stabilises the more you water. New growth on your plant looks good .

When looking at the plants in the picture it looks to me they are hungry and having some issues with Calcium and watering, You started the PH was aorund 5.5-5.7 in your last diary entry, that is to low for a soil based grows and it is on the range of locking out calcium from to low of a PH. I think you need to not adjust your PH going into the medium "if you are" and you should give them some Liquid nutrients, Liquid Nutrients will be available to the plant immediately and then you can mix in some dry amendments if you wanted to keep it organic and such or just continue with the liquid. One thing to note is with Liuid nutrients its best to get sme Runoff with every feed, however soil can sometimes become water logged and compact over time with to much water. so water in slowly. The temps at night will be negatively affecting you as well, 14c is to cold and will start to slow the metabolic process for in the plants, Ideally 18c should be your night time temps, its colder but not to cold it hurts the growth. This is especially important as your are entering flower and they will be stretching a lot. The droopiness of the leaves says you are overwatering with out it drying out enough between waters, it is also what happens to plans in the night and that get to cold. One quick tip, Stiff stems and droppy leaves = overwatered limp stems and droppy leaves = underwatered Good Luck!