KosarZiga said:

Hello guys.
I will start preparing soil for this year. (I'm a bit late, plant to plant then outside in 2 months max)

At our municipal compost site I got first grade compost. I work for a company controlling compost site, so i got detailed chemical analysis of it.

Here are nutrients:
N: 18220 mg/kg
P2O5: 9380 mg/kg
K2O: 18000 mg/kg
Ca: 6.3%
pH: 9

It's a bit strong, pH is also high, I know i need to mix it with something else,to lower pH. Peat moss? Any experience how much? What's the ratio?

I also have 2 years old composted cow manure available..
Plan to add perlite of course.

Other supplements.
I can't get everything, since it's not available in my country and ordering it from abroad could take to long or with to high shipping costs..

I can get chicken manure, fish meal, bone meal, alfalfa pellets, azomite, gypsum, neem. Kelp is expensive.. Like a lot.
And mycorrhizae.

What would be recommended doses for those.
Im planing for around 100 gallon pots per plant.
And cooking time would be around one months, since it will take some time to get all the ingredients, so far I only have compost, and garden center has perlite and peat moss.

Any help would be greatly appreciated.
Even useful links :)

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fishbuds said:

ph of 9 for finished compost? something is not right somewhere if that is really the ph. finished C should land between 6-7. At least, the test sheets i have seen, for the compost I get/got. I dont take someones compost unless they have a test to show me.

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GDub51 said:

I'd like to see your 100-gallon pots! I'm jealous of your compost! I have just one suggestion. Bat manure is the new hot additive. There are two types. One for the veg cycle is high in nitrogen from insect-eating bats (Nitrobat) and the fruit-eating bat guano (Cavern Culture) is for topping the soil at the switch to flower. The other big revelation for growing is using your own urine, in early veg, diluted of course as the most explosive reaction I've experienced with pot. A new shade of green, much deeper than before resulted in a few days! About one good pee in every 2 gallons of water is about the right dilution. I also pile on vitamins the day I take the urine, since they mostly pass out thru the urine I figure it's a good way of getting some trace elements into the plants. The kelp is important for plant strength and rigor you've got most of the rest already in the compost so if you have enough to be a third of total soil mass or so you should need little else. Kelp and Silica (applied foliar) are important if you have climate issues. I have high temp's to deal with, last year a couple of days in the 100's drove me to move all into the garage!! We also deal with "Santa Ana winds" here, hot dry blasts that last a day or two happen a few times a season so I have to top a lot to keep height under control and stake all plants. I also prune away most inner growth for better airflow through the plant. So if you have days that get over 90 where you are, Kelp extract will be worth your investment, and think about all the money you'll save using your own urine for plant food!

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KosarZiga said:

Hello guys.
I will start preparing soil for this year. (I'm a bit late, plant to plant then outside in 2 months max)

At our municipal compost site I got first grade compost. I work for a company controlling compost site, so i got detailed chemical analysis of it.

Here are nutrients:
N: 18220 mg/kg
P2O5: 9380 mg/kg
K2O: 18000 mg/kg
Ca: 6.3%
pH: 9

It's a bit strong, pH is also high, I know i need to mix it with something else,to lower pH. Peat moss? Any experience how much? What's the ratio?

I also have 2 years old composted cow manure available..
Plan to add perlite of course.

Other supplements.
I can't get everything, since it's not available in my country and ordering it from abroad could take to long or with to high shipping costs..

I can get chicken manure, fish meal, bone meal, alfalfa pellets, azomite, gypsum, neem. Kelp is expensive.. Like a lot.
And mycorrhizae.

What would be recommended doses for those.
Im planing for around 100 gallon pots per plant.
And cooking time would be around one months, since it will take some time to get all the ingredients, so far I only have compost, and garden center has perlite and peat moss.

Any help would be greatly appreciated.
Even useful links :)

Click to expand...

mancorn said:

I’m leery about municipal compost as I don’t trust what other people throw in their green bin. Think a lot of people just figure it’s a way to get rid of nasty shit from the basement/garage and dump in a bunch of crap. I’m sure your city cooks the shit out of the compost, so hopefully disease and pests aren't a big issue, but the pesticides and motor oil isn’t getting cooked out.

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lex0415 said:

Peat moss with a wetting agent, maybe 2:1 Peat:Compost, some perlite too. Add some lime and whatever else you feel is necessary. Maybe keep a weak batch for seedlings and a 'hot' batch for transplants.

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