This is what standard runner beans from plants with red flowers look like:
There is also a variety with white flowers and pure white beans. I tried to grow a few of those last year, but the germination rate was very poor, and I got barely fifty white seeds to plant this year, hoping to get more for the future. However, as readers will remember, last year I was growing the ordinary variety too, to fill the empty space due to the aforementioned poor germination of bought seeds. I was aware that I would get some hybridization, because I had that before. The result of hybridization last time was plants with half red, half white flowers, and seeds that looked just like the standard, except the pink/lilac colored parts were light brown/beige.
This year, I only planted white seeds, and I was surprised to get some plants with full red flowers from them. Well, I am even more surprised now.
So far, I got a handful of “standard” lilac-black seeds, a lot of pure white seeds, and a bunch of pure black seeds. I have never seen pure black runner beans before, so I asked Google. Varieties with this color do exist, but on a cursory search, they are only grown in the UK and not sold in CZ.
Which is curiouser and curiouser. If I get enough black seeds, then next year I will sow only them, and we shall see what comes of it. I will probably have enough white seeds to save for the future. I also might try to grow all three varieties at once, each in a different part of the garden. That will reduce cross-pollination, but it will not eliminate it. It is a bugger. I wanted to grow two runner bean variants – white and red – in alternate years. And now I have one pure red strain in the cellar, white seeds that are somewhat unpredictable mongrels, and an intriguing new black variety that will probably throw some unexpected curveballs too.
I know that my pure red strain should remain viable in the jars in the cellar for at least two more years, so there is no big rush to renew those. I think I can afford to experiment. Especially since no matter what I do, the remaining beans will be perfectly edible. The worst that can happen is I won’t get pure color strains, but a technicolor seed roulette.








































