Questions About Potatoes

Not a "real" post, not really telling you anything, just asking.  I could ask Google but I thought I'd live like our ancestors and ask people instead... except on the internet.
Just asking about growing potatoes.
My potatoes seem to grow fine; guarded against heat as much as possible and not over-watered, they seem to grow well.  The thing that concerns me is the plants all die before they flower, which I've never had before. A few potatoes are produced (any are a bonus!) but I'm wondering if something I'm doing or something in the environment may be causing the lack of flowers.
It's the potatoes I've planted in Brisbane that haven't produced flowers; in previous seasons I was living in Maryborough.
Would I have a better crop from the same plants if they did flower?
Any thoughts and suggestions are welcome!
Signed with gardeny goodness,
Cassandra Louise.