I'd like to see more Heuchera cultivars with showy blooms. I like those with colorful foliage, but I still love the old fashioned coral bells with those graceful sprays of little pink blooms.
On that same mode of thought, I too would love to see hybridization work toward showier blooms on Hostas.
Ground Ivy is such a pest for me, but it is an attractive little ground cover. I'd love to see a tamed down version, perhaps with larger blooms. The sea of blue it could potentially provide would be beautiful.
