pH 6.8-7. 3 weeks old in biobizz all mix medium.i feed it fish mix and bio heaven following the chart. 500 watt quantum board. I feed once per 5 days as the others
Hi Leon,
This is my idea...and shooting from the hip since I do hydro and coco. You commented that you fertigate every 5 days? They look a little dry and that seems like too much time in between waterings. I'd go every 3 days and maybe less water so they don't get waterlogged. Rely on the perlite for drainage.
The organic mixtures and microbes and such inside the soil also need plenty of water, so my feeling that smaller more frequent feedings may improve things.
Oh and humidity...don't recall what yours is. But too low closes leaf stomata and slows growth. Gotta have good humidity for fast growth.
JD