I have been growing a plant for about 3 1/2 months in my balcony, the plant looks great, and I never used any fertilizer, only water and sun light. I have read though that everybody uses fertilizers, should I too? What effects would it have in my plant if I didn´t use any? Which fertilizers do you recomend me? I live in Spain, so many of the fetilizers you use probably don´t exist here, so it would be better if you told me which ingredients would I have to look up in the fetilizers labels