▁areas ▁up ▁to ▁an ▁alt itude ▁of ▁ 9 0 0 ▁m . ▁ ▁K ō h ū h ū ▁grows ▁particularly ▁quickly ▁at ▁forest ▁edges ▁located ▁at ▁the ▁bottom ▁of ▁high ▁terra ces , ▁and ▁can ▁also ▁be ▁found ▁growing ▁in ▁river bed s . ▁It ▁grows ▁readily ▁in ▁for ested ▁areas ▁that ▁have ▁been ▁dist urbed ▁or ▁in ▁rever ting ▁far ml and , ▁playing ▁an ▁important ▁role ▁in ▁e colog ical ▁succession . ▁ ▁Life ▁cycle / P hen ology ▁ ▁Most ▁of ▁the ▁plants ▁in ▁the ▁genus ▁Pitt os por um ▁are ▁easily ▁propag ated ▁from ▁seed , ▁but ▁germ ination ▁may ▁be ▁slow . ▁In ▁h ort icult ural ▁production , ▁the ▁stick y ▁subst ance ▁co ating ▁the ▁se eds ▁is ▁removed ▁before ▁sow ing , ▁as ▁it ▁acts ▁as ▁a ▁germ ination ▁in hib itor . ▁The ▁se eds ▁are ▁treated ▁to ▁simulate ▁natural ▁conditions ▁for ▁six ▁weeks ▁in ▁order ▁to ▁improve ▁germ ination ▁rates . ▁ ▁K ō h ū h ū ▁is ▁a ▁relatively ▁fast ▁growing ▁plant ▁growing ▁from ▁ 0 . 5 ▁metres ▁to ▁ 3 ▁metres ▁within ▁five ▁years . ▁The ▁root ▁system ▁is ▁shall ow ▁and ▁spread ▁out . ▁These ▁characteristics ▁make ▁it ▁ideal ▁– ▁when ▁used ▁in ▁conj unction ▁with ▁another ▁plants ▁– ▁for ▁use ▁in ▁stream ▁stabil isation ▁and ▁er os ion ▁control . ▁ ▁Flow ering ▁happens ▁in ▁late ▁spring , ▁from ▁October ▁to ▁November , ▁and ▁the ▁m atur ation ▁of ▁the ▁fruit ▁happens ▁between ▁mid -