Hhhmmmm… to each his own.
Welcome to Mirai Allen!
I have not seen Mr. Morton’s book. I DO understand the mindset.
Just my opinion…
What THEY (above) said…
Inorganic NPK fertilizer will keep your plants fed. Lazy use of onetime per year CRF inorganic fertilizer will keep them alive all year. Shure, it works. They will grow like crazy! However, they won’t sing…
It’s ALSO been said that plants don’t need any fertilizer. They will get what they need from the breakdown of the soil. That is true, if they are in the ground with available composted material. However, the practice of using sterile inorganic bonsai soil (akadama, pumice, lava) requires some nutrient applications.
Soft fertilizer, organic material, digested by fungus and bacteria will give the trees the micronutrients and slow released NPK they need to sing.
Benificial symbiotic microbiom grow and add their micronutrients and vitamins. Short internodes, green leaves or needles, vibrant flowers, insect resistance, healthy trees.
I don’t have to be sold on this. I’ve been raised and educated to see and utilize organic gardening practices on my bonsai. Biogold type organics and Dr Earth type inoculant products. Organic compost, fish emulsions and seaweed will do this, too.
Try going for a year without vitamin C, D, B12, or iron. Kill your gut flora and fauna with antibiotics and antifungals. Go for a week without fiber in your diet… Have you ever had to eat K rations or MREs for a month? You would survive, but you would NOT be a happy camper…
Ooohh, the humanity!
That being said, I do have and utilize CRF and inorganic fertilizers. They will grow trees if I’m not watching them closely. Especially potted pre-bonsai or in the ground trees. I do NOT rely on them as a ‘refined bonsai’ frontline, stand alone practice. Organic microbiom. My trees are crazy healthy this season. Very little insect, fungal or root problems. Their microbiom helps keep them happy.
Balance of water and oxygen…lots of sun.
Now I JUST need apply more style and refine techniques…