I start with the weakest solution, and sometimes cutting that by half as well. The sodium in the fertilizer gets absorbed by The Roots. Carrying with it the nutrient solution impregnating the plant cells. We've been discussing whether the same thing could be done with organic fertilizer at my home Orchard as well. This would be a great time for
@Inflorescence who has a greater understanding of organic fertilizers, and synthetic to shares her knowledge.
For some reason, I completely missed your tag and just saw it now after reading through the thread. I was like wait, that’s me he’s talking about, haha.
Yeah so, there’s a lot of more recent research by Dr. James White and quite a few others about how plants eat, probably
@SpiritFarmVa has some info on this as well being he pointed me to James White.
Synthetic fertilizers aren’t actually in a form plants can automatically use. There also is a lot wasted with them, I think the range is 30-40% of synthetics are used by the plant while the rest goes down the drain. Plants have to use energy to convert the synthetic fertilizers into a form they can use. So you actually are depleting the plant a bit everytime you use a synthetic. Not to say it won’t bounce back, but it can cause and does cause issue. Synthetic nitrogen also has been proven in multiple studies to attract pests and to weaken cell walls. So you can have more pest and disease issue with synthetics. Plus the sodium in synthetics kills off the soil microbiome and important diversity to keep everything in check, such as RKN. All of this is shown in research studies, plus more, so it’s not a subject of controversy.
What Dr. White and a handful of others have shown in research is that plants actually eat microbes, or you could say, they allow the microbes to penetrate their tissues and they eat nutrients off of the microbes and then later expel them out to collect more nutrients from the soil. These microbes have been shown to have a direct bearing on root health and root hair formation. They also have a direct bearing on the natural growth hormones within meristem tissues of plants. So your microbial health affects that growth hormone within roots and we really do not want to be killing off microbes.
With this system that matches how plants are meant to eat and collect nutrients, you have 100% efficiency. Nothing is wasted, and nothing runs off to cause harm anywhere else. This also helps the plant to focus its energy on growth, secondary metabolites, and on its defense system. So you end up with a plant that is less likely to have pest and disease issues, depending on the strength of soil microbe diversity and its genetic strength to be able to collect nutrients.
All of that to say, I recommend worm casting extract for newly rooted cuttings. Leaf mold soil can also be used for an extract and is a great way to get natural mycorrhizal fungus starting in there. Many people don’t realize that not all strains of mycorrhizal fungi benefit all types of plants. So having a diverse inoculation is more beneficial than single strains of something cultivated for a certain type of growing condition.
Also, diluted vinegar mineral extractions either for the roots or foliar spray. Lactic acid bacteria serum (LABS) can also be used from time to time, which gives an overall boost to the plant, can help with preventing fungus gnats and any other fungal issues. KNF FPJ made from figs is also recommended. Seaweed extracts are also great.
Anything that is coming from something breaking down in the open, like compost, leaf mold soil or worm castings, you want to have it strained through cloth so that it does not bring in insect eggs if rooting indoors. This is why I recommend worm casting extract and not tea. Plus the worm casting extract is made instantly and does not need to sit.
I am loathe to recommend anything fish related for indoors,
but you probably could use very diluted fish amino acids if you are willingto make it, as it is lower odor and has benefit at high dilutions.