2 Grow - Quick One

Looks like it is compacted. Large chunky woodchips aren't the best option to aid drainage. The fertilizer used isn't going to wave a magical wand over this and fix it. Find or make a fluffier substrate. Don't use wood chips or large chunks of anything for that matter. That will just impede root growth by making it expend more energy circumventing the large objects. Better O2 in rootzone will help the most. This is the dynamic of compacted soil or soil with way too much water retention. No product will fix slow root growth in this case. Change the properties of your soil next time, and results should improve.

If it soil worm, then you are blessed. I was buing as extra in fish shops, just noticed they hate nutrition feeds and try to run away from pot ;))) Hard to see or understand.

You dont follow wet/dry cycle, thats some larvas Easiest way - nematodes. Cheap way - let soil dry out and pot be light to lift before watering next. Follow that, rough top lair of soil, just a bit away from stem, for not harming roots. That way youll get better evaporration , i do ir daily, on watering day - after 6 hours, let it soak , otherwise you wont beeak surface properly. Simply tool - table fork, 1-2 cm deep max, keep away from top roots. But if you water her around , not straight under, you will help yourself a lot with caring about grow medium.