They will not cross two total different genus Hyacinth bean is genus Lablab Species purpureus vs pole bean phaseolus species vulgarus Rodger

I agree with Rodger - there is no danger of crossing between hyacinth beans (which are also very much "pole") & common pole snap beans.

If you have not saved hyacinth bean seed before, be aware that it requires a very long season to mature. They are daylength-sensitive, and will not even bloom until the days approach 12 hours, in September.

Thanks! This is helpful.

I did not personnally save these hyacinth bean seeds, a freind at work collected them from plants she had last year. In September, the days do shorten to about 12 hours in this area, but my freind indicated a longer bloom time. In anycase, I am mostly growing them for the colorful folage. Any flowers will be a bonus.

Thanks again, Kay.

Hyacinth beans are very beautiful. I think you will have no trouble getting blooms.

Jim

I'm wondering are the Wang Kong beans a Hyacinth bean?

"I'm wondering are the Wang Kong beans a Hyacinth bean?"

No. They are a runner bean (Phaseolus coccineus)... so you could grow them, the hyacinths, and the common pole beans (I'm assuming that they are snap beans) without crossing.

Competition, however, is another matter. Hyacinth beans are very rampant vines, so if planted next to the snaps & runners, they might overrun them. If grown on a trellis, I recommend giving them some space, 2 feet or more if possible.