K
kenmastazz
- 35
- 8
I like this a lot. The numbers are ec and not ppm though right? 1800ppm at .7 or .5 would be overkill for any normal sized plant.Going by Tissue Analysis, and a company that's been making plant specific fertilizer since 1965.
They say the recommended NPK ratio is 19.5-20-39 as a base NPK fertilizer.
They use
4-20-39
15.5-0-0 Calcium Nitrate
Magnesium/Epsom Salts
Mono potassium Phosphate in 3rd-4th weeks of an 8 weeks flowering strain. 0-52-34
I will give a link to their recommended feed chart with their fertilizer, and for use as a basic guideline.
Our plants really seem to like this fertilizer ratio.
We grow large plants, in large 20 gallon containers of Promix BX. 1000w Gavitas/Hortilux EYE HPS for Seedlings, Veg/Flowering.
4-20-39 Recipe 2017
They say the recommended NPK ratio is 19.5-20-39 as a base NPK fertilizer.
I like this a lot. The numbers are ec and not ppm though right?
On his source link the chart is a feeding program. If he only uses it at quarter strength, it's probably ppm; that's as low as you'd have to go to be feeding normal plants with that chart.which numbers are you talking about ? this: 19.5-20-39 ? I thought this are % of NPK...im confused
On his source link the chart is a feeding program. If he only uses it at quarter strength, it's probably ppm; that's as low as you'd have to go to be feeding normal plants with that chart.
It's the same as the NPK you see on bottles. It gets tricky though if you don't know the composition of the salt mix. Other thing is people can create errors or use their own calculations. I like the formula 224(112) for flowering, but i use any 111 or similar for veg growth. They use a healthy leaf and base their food if the leaf's nutrient composition. It's believed that a healthy leaf will have the plants ideal composition because it made that leaf perfectly. Dynagro does a lot of that and says that 312 is the leaf and therefore ideal composition. That is a typical foliage plant profile and that's why it's named foliagepro. Cannabis primarily uses nitrogen, potassium, calcium, and magnesium. I tend to agree with the dynagro formula, though i would supplement mg and possibly k during later flowering if i was only using a 312 1part. Who knows though, maybe it would be unnecessary;i never tested that specifically enough to say definitively one way or the other. I also let my testing cut die recently so. All this talk leads me to reiterate how important runoff is when using these salts. You need to be replacing the last food and not adding to it. You need to give a lot of runoff, especially in peat with only salts. Also, feeding requirements can vary DRASTICALLY between plants. I don't think there is a one best formula. One should aim for a complete formula that contains a whole day with as little extra as possible. Watered with good runoff daily would thus satisfy the plant fully.now i know what you mean and my guess would also be that its ec 1.8 but I think even that is high 1.4-1.6 max for me!
the ratio of 19.5-20-39 what exactly is that? % of that element(19.5%N 20%P etc.) in that solution or is it gram/ounce etc.?
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