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I just finished curing the buds and let them dry further for the night, lowering the humidity from around 80% to around 60%. Should be good to smoke today.
I'll be back later today with numbers and hopefully an answer to your question.
I bought them at Hornbach, a huge store chain in Germany.
The FloraSelf was the cheapest organic fertilizer I found.
If I was to do it again I would use 70% of the fertilizer amount a non-fertilized soil base and add mycorhiza on the first watering for most strains.
For hardcore american strains I would add a cup of calk per 50L bag of soil - I had some cal-mag issues showing up.
I've been working with several slow release organic fertilizers and find them all to be quite similar. Currently, horse poop pellets work best for me. And it also the cheapest option I found so far.