I was reading that this one and yellow jabo cabelludinha are VERY tolerant of fertilizer and can take tons of it. I have added Holly Tone thus far to both of those and yeah they grow, but not quickly. Greg Arabie Jr on FB was saying he is adding monthly doses of 19-9-9 Osmocote and bi weekly liquid fertilizer that was 10-10-5. I am not recommending this program personally, but he said they are extremely tolerant of fert and I will be cautiously upping the load on mine.