On August 21 I commented on the effect that fertilizing my hoyas with "potassium dihydrogen phosphate" was having on my holes. Due to the visits that this writing has had on my blog, I have observed that few people have been interested in my writing. I have to say that the advantages it has produced in all my holes have been "very favorable" and proof of this is this photo where a strong and shiny guide has grown in a knot of an old branch (6 to 8 years old) that it lost its two leaves as you can see in the photo. And if you enlarge it several times you will notice it much better.
And this is the link in case you want to read its content. It may interest you:

https://hoyaspepeuve.blogspot.com/2021/08/fosfato-dihidrogeno-de-potasio-e.html