Nepenthes hamiguitanensis is sympatric with N. justinae (previously identified as N. mindanaoensis) and grows in the same altitudinal range as N. micramphora and N. peltata; the latter two species are typically found in more open areas, where they are exposed to higher levels of incident light. Despite this, no natural hybrids involving N. hamiguitanensis have been observed with certainty; it has been suggested that the flowering times of N. hamiguitanensis and the other Nepenthes species of Mount Hamiguitan may differ.