A collective plant organ structure development stage (PO:0025338) that begins with the onset of the plant organ development stage (PO:0025339) and ends with either gametophyte senescent stage (PO:0025343) or sporophyte senescent stage (PO:0007017) or death.

The shoot system (PO:0009006) develops fron the shoot apical meristem (PO:0020148) in the plant embryo (PO:0009009) in vascular plants. In lower plants the gametophore (PO:0030018) arises from a gametophore meristematic apical cell (PO:0030019) in the protonema (PO:0030003).