See if you can find fertilizers on Amazon.com. I'm not sure if what you get in Norway when you do a search is the same thing I get, or if there are international shipping restrictions, though. You might just want to check with your local hardware and garden stores to see what they have available. Hydroponics stores are a good place to check, too.
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When my plants are young (but not until after the cotyledons fall off) I give them a 4-12-4 fertilizer mix, as that helps stimulate root growth. I then switch to an 8-4-4 food with other stuff in it for stem and leaf development. Once the flowering begins, I switch to CalMag, as chile plants need calcium and magnesium to help prevent blossom end rot (BER). Although I use CalMag, you can use any fertilizer made for tomatoes, as tomatoes and chiles are closely related and have about the same feed needs. Note that I grow in pots, and the potting soil I use comes with some fertilizer already mixed in.
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What you need for your plants depends upon your growing medium. If the pH is too high or too low, you will want to use fertilizers that help balance out the pH levels. If you're growing hydroponically, that's another whole game. Check with your local agricultural extension of a university and see if they can either tell you about the conditions of the local soil for chile growing, or if they can help you get a soil analysis done. Â