Here are some of my homegrown hybrids. The plants are about 2 years old. The mother plant is N. Splendiana, which is easy to make hybrids from since it always seems to be in bloom. It's vigorous, and it usually passes that trait on to its progeny.
N. Splendiana x mixta
N. Splendiana x coccinea
N. Splendiana x (spathulata x veitchii)
