First Wonderwoman Greenhouse Grow

This week plants have been slowly making their way through the stunting. Have been just lightly foliar feeding with cal-mag and grow this week. Pots are now light and looking for water so have watered with nutes. Wonder Woman (showing signs that it needs nitrogen) - Gave 4 litres of 6.5 Ph water with nutrients til runoff 0.25ml/l cal mag 0.25ml/l grow 0.5ml/l heaven Total EC - 0.485 RUNOFF EC - 1.7 RUNOFF PH - 6.2 Super Skunk (seems to have enough nitrogen but needed a feed) - Just fed nutrients in 6.5 water today, gave 4 litres to give runoff 0.125ml/l cal-mag 0.125ml/l grow 0.25ml/l heaven Total EC - 0.482 EC runoff - 2.78 PH runoff - 6.1 Run off was very high on both plants, theyve both had no feedings other than foliar feeds since they were put into soil around 3 weeks ago. Why so high? Considering flushing them if i see nute burn but in a bit of a conundrum as dont want to drown them again and overwater doing another flush. Also bought superthrive, heard good things so wanting to see if that will help the plants recover so made up foliar spray.