The bushes are shooting up fast — the fan leaves, palm-sized by now, are already poking into the light. LED is not HPS lamp, good for me :)
I'm training the branches daily with soft wire ties from the garden shop — cheap as chips. Watering with RO water, pH dialled in. A 15-litre reservoir makes it easy to manage PPM and pH, and the air stone keeps the solution well-oxygenated — roots love it.
3 weeks in without Simplex Coco base. A couple of days ago the stems started showing a slight red tint. Figured I probably didn't mix enough nutrients into the top layer: I went with 3 grams per litre of substrate — 9 litres of Simplex coco brick and 3 scoops of nutes, carefully blended. Was worried about overdoing it.
Still, even at the minimum dose I got minor burn on the lower leaves. The substrate had been pre-soaked with Simplex Coco base — should've flushed it for a couple of days first with a CalMag solution and pH 5.6–6.3.
Three weeks later I top-dressed with another half scoop (5 g) per pot. For a long-flowering sativa that's pretty standard practice — topdressing every 2–3 weeks works well.
Overall, Bio Feeding is a really straightforward option — accessible and easy to follow even for a beginner like me. Can't wait to taste the end result: never grown bio before, only mineral nutrients.