Pfff

It's the purple led it's useless get a better light Hps are cheaper but cost loads in electric but they don't grow or flower in the purple leds sorry to say I lost full tent Christmas cos the purple lights caused hermie

Now that it is flowering, there will be little extra growth, except for the flowers of course! Not much you can do except keep it healthy and happy until harvest.

There is an app called photone. You can use that to gauge your ppfd. At the moment you should be around the 300-400 ppfd

Hey there idd, basically yes, it's too small. That's because your light isnt strong enough and your environment is not correct. you should be at around 24°C and 60% , right now you're probably off the mark at least with humidity. these are the variables that regulate growth rate. that's why it's going slow. Fix these things and you'll see a huge difference. Hope this helps ! 🚀