Hey there, Ben here from Hungry Bin. Thanks so much for the post and photographs.
I would recommend starting with a 25:1 dilution rate to test irrigation, but take care not too add too much nutrient all at once, as you can run into issues with uptake of key trace nutrients if you get the nitrogen rate too high in the soil. (boron for example).
You can also use vermiliquid as a foliar spray, we recommend dilution rates of over 100:1 if you do this, and be careful as you can end up blocking the aspiration pores on the plants leaves if you build up a residue. We are aware of bonsai growers that are using foliar spray with high dilution rates.
Vermiliquid is slightly alkaline, so if you use it a lot you can also affect the soil acidity balance, which then affects the uptake of the key ingredients for your plants. We are aware of growers in the US using special feedstocks involving crab shell etc to influence the components in the outputs (thereby adjust percentages of target compounds in the plants...), but they generally tend to keep the secret sauces they use in the hungry bins secret for obvious reasons.
The advice given to test one plant first is good, you'll probably be able to see results almost immediately.
I've added a photograph or largest single installation, which funnily enough is in a prison...
I hope this info helps, Ben.
View attachment 2228135