
..... it looks like P defc. to me too,... given the low feeding with mild organic nutes, this makes sense,... pH is always in play, and organic or not, in-pot pH needs to be monitored, it's not adjusting the feed solution's pH that's not recommended,... best tool for this is the Accurate 8 soil pH probe-->

hsoil: long probe in this icon is the A8,...

OF soil is not to be trusted, a very common problem soil in here,.. I stopped using it a few years ago after getting bags in the low 5's pH!

-instant FUBAR.... their quality control is a joke IMO,... Point is, to make sure this isn't caused by a pH lockout, and is just a simple lack-of,... but treating if different! Add more feeds to off pH soil will make matter worse,....
Get me a whole plant pic in normal light, there's more I need to see,....