Originally Posted by Los_Serpent
I'm trying a new thing, I got tired of spending plenty of money on fertilizer. And bought a 15 7 15 fertilizer that has pretty much everything I need. It was not meant for weed so I don't know the dosages
I have a huge plant in a 18 liter bucket. It's granural fertilizer but I'm gonna dissolve it in water. How can I figure out dosage based on the fact that it is 15 7 15?
1. This has way too much nitrogen, not enough phosphorus compared to potassium. If you're using solid and liquid nutrients it is best/essential to stick to nutrients and media meant for cannabis.
2. I am becoming a fan of complete fertilizers. So:
a) Use a supersoil
You can mix your own, as long as it has
N - blood meal, alfalfa meal/pellets
P - rock phosphate, bonemeal
K - vinasse, wood ash
Ca - magnesium lime, rock phosphate, bonemeal
Mg - epsom salt, maerl magnesium lime
Si - silica clay like Mineral Magic, Jersey Green Sand, etc.
S - epsom salt
Trace elements: lava meal, basalt meal, seaweed
Or you can buy ready made supersoil mixes. Or buy a heavily ferilized soil.
b) Make your own liquid nutrients
The best is to ferment cannabis parts - leaves, flowers - in sugar and water, with no air. Think of it as kombucha
without the SCOBY.
Just use the leaves or flowers, reed sugar (any raw sugar because it has more nutrients) and cool water. The microbes on the plant are all you need for fermentation and what you're looking for because they're likely to be friendly to weed.
This is really effective, has everything cannabis needs in a liquid form, and has sugars in it which the microbes will used to further break down the nutrients in the supersoil.
You will need to use different parts of the plant for it's various stages - leaves from seedling through veg, flowers through flowering. Those can be cannabis flowers, hemp flowers, I'm using the flowering parts of stinging nettles right now.