Any ideas what could be causing this yellowing. Its raspberry cough, grown in clay using flora trio with ro water 80°f and 65% rh
18/6 lights tsw2000 drawing 400 watts
How close do you have the light?
About 18 inches
Notice how its starting between the ‘veins’ of the leaf. That is more then likely a calmag deficiency. Being in clay pots makes ur grow pretty much hydro (soilless) and all soilless growers should supplement calmag at earlier intervals then soil growers. Add her a few mL next feed and she’ll be fine. Dont forget to pH properly.
Thanks very much for your advice.
No problem! Welcome to ILGM and best of luck