Hibiscus do they all have seeds?

Do some not have seeds? I have a burgandy one that Jap. Beetles chewed on this year so it didn't bloom but do all hibiscus make seeds like my red hardy one?
The red one gets 4 or 5 feet tall and has lots of blooms,the burgandy one only gets about 2 feet at the most and has about 2 blooms a year.

Lavina

As far as I know--and I have a few different kinds of Hibiscus--they all have seeds though with some the seedpods fall off before ripened or are eaten by bugs on others. The seeds vary as well far a small round seed, to a small bean type seed to a feathered looking thing!! hehehe If you need some seeds, I have seeds for a Hardy DInnerplate Pink, Hardy Dinnerplate Red, Texas Star, Confederate Rose-double pink, Flower of an Hour and maybe a few others!! Bonnie

I have a hardy hibiscus lavender chiffon that does not set seed pods and must be propagated by cuttings.Shinny

My tropical 'Sunshowers' makes seedpods but they drop off almost immediately!! So guess some do NOT do seeds! hehehe Bonnie

My Lord Baltimore is only propagated by cuttings, too. No seeds.

Thanks ladies I had forgot about this post and had not marked it.

I have one hibiscus that keeps comming back every year but does not bloom. It bloome4d the 1st year and has not bloomed since. Any ideas on what I'm doing wrong?

Lavina