Looks like the dark red filter lightened the roses substantially, and now they're hard to print. The green leaves should look virtually black with that filter. My strategy would be to increase the overall exposure to get detail in the highlights, if that is possible, and dodge to get the shadows, maybe using a lower contrast grade.
This might also be a neg to try some pre-flashing on to get the highlight detail, but there are others here more experienced in that technique than I am.
Next time, try a lighter red filter.