In my backyard is a Lepidozamia peroffskyana. It is now about 25 years since planting.
If there has been normal rain in and before December the plant grows a new crown. Usually of five fronds and takes over two weeks for the fronds grow fully In dry years there is no sign of a fresh crown. The old fronds are, at the time of writing, slightly longer than two metres. The plant base is about 33cm high and 25 cm diameter.
4/12/2016 cone growing
Cone now 43 cm high 16/12/2016
The whole plant 22/12/2016
Cone last stage 2/1/2017. Tapping the cone produced a faint white mist, assumed to be male spores .