The ladies are around 60 days old now. 21 of those days were a struggle through crazy temperature/humidity fluctuations (had to get a thermostat/hygrostat) and high EC. The EC kept swinging out of control due to the blocks being reused and not being properly purged. The plants have happily recovered now.
These girls go into slabs for flowering in the next week or two.
EC 1.2 / pH 6.2
25C° / Humidity 62.5%
1L jug vs Lavender in 10cm Rockwool cube