The development of cones of Agathis robusta south
Queensland provenance has been described in detail
by Nikles (1965). The period for each phase is possibly
typical of the whole genus, though the dates differ (for
example, A. microstachya is pollinated in December).
The sequence of development is:-
Year 1 February: male cones emerge,
June-July: female cones emerge,
August-September: pollination,
Year 2 September: fertilization,
Year 3 January: seed fall.