Blackberry (Auto) - Fast Budz

Seeds have been germinated and I'm looking forward to growing this predominately Indica strain. The primary goal I have set for myself is to setup a SoG between two plants (if the indicas have enough side branching for my space) and to achieve a blackberry smell to the final product (which Fast seeds claims it will). I'm also excited to see the phenotype; which produces very dark blue/purple hue coloured flowers.

The plants have started to sprout leaves and were transplanted from the paper towel/plate to their net pots in the reservoir. It has been extremely cold so the temperatures have been low. Also, the grow space has had high humidity and this is condensing on the walls --> going to have to turn the exhaust on even though they are small. I will start feeding the plants next week as I've read that most seeds can last two weeks without any nutrient supplementation. One of the plants is starting to yellow the leaves a bit though -> deficiency already?

Plants were fed and looked better after 1 day (yellowing was gone) but they stopped growing --> I think they are nutrient burning. I have drained out the nutrient solution add added just neutral pH water to bring the TDS back down to 50 from the 140 reported on this week. Sorry for lack of relevant pictures as it is the holiday season and I'm too busy to take them and spend as much time in my garden as I would like too ;-).

The plants are growing well again and they were definitely nutrient burnt as the lower leaves (first leaves) developed the browning tips characteristics of this that spread through that leaf. The tallest plant is growing well but the 2nd one is still growing slowly. I have notices the signs of them expressing their sex and can see hairs. I will upload photos later showing their progress. I am going to raise the feedings very slowly as I don't want them to stall in growth anymore to still get a decent yield.