More post-production playing.
In a way, just devoting some time to playing with a color image and converting it to black and white is a very educational experience. For instance, many times with black and white film and no filter, everything gets lost – it’s all the same as far as the film goes.
Here, a digital image of a fremontia, a low-growing bush found in California, with bright yellow flowers, gives way to a rather lovely black and white image (at least I think so!) when properly manipulated. Filters are necessary for good b&w, but here, just a few mouse clicks, some home-made or pre-made presets, and off you go!
I am currently going through my archives and looking at yellow things – how well do they change into mono?