Hello friend,
Is there any shipping bans for Peru? I know a german company i really like called
@greenbuzz nutrients is active here on growdiaries and they have a product called "more roots" that i really like. They could possibly mail bottled nutrients to peru?
Otherwise there are so many dry ingredients, natural ingredients that you can find anywhere . And possibly building a living soil may be best for you. If you have any sort of garden store, or agricultural store nearby they will have what you need.
For your root development finding something containing mycorrhizal fungi would be good. If you can find anything that is like kelp extract, kelp powder, seaweed that will be a very good addition to the soil. Then getting something that can build your three main nutrients, nitrogen/phosphorus/ potassium you can try various bone meal, bat guano, and manure(maybe a farm nearby that would allow you to have some manure from horses etc), you can also use other plants like banana peels can provide a good amount of phosphorus, wood ash and some like plant compost( also known as green compost). Many other things around like epsom salt for magnesium, egg shells for calcium, coffee grounds for nitrogen and other nutrients. Many things are readily available you just have to research them.👍
A good site for organic growing and guidance is kisorganics.com they're all living soil and organic growing people.