Flower learnt to play rugby league at a young age and was also a great runner, running marathons with the Redfern and St. George Harriers clubs.

[3] Originally a South Sydney junior and prop-forward, Flower played eight seasons with St. George during their foundation years between 1922 and 1930.

Flower enlisted in the Australian Army as a 40-year-old during World War II and attained the rank of lance corporal.

His 19-year-old son (Harry Edwin Flower junior) also served in the Australian Army and survived the war.

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