I'm trying a lime green celosia this year.

Not flowers, but we do dry other things that keep their green. There are two plants that we pick when their seed pods are green -- Fibigia clypeatea and Utriculata allisoides. The fibigia is known as "Roman Shields" and shows up in seed catalogs from time to time. The Utriculata is in a lot of alpine seed catalogs and seed exchanges. I haven't seen a common name for it.

Crocosmia leaves seem to keep whatever color they have when they'd picked. We've had wreaths of crocosmia leaves stay green for over a year.

I'm interested to see the answer on the Bells of Ireland. If they can be dried green, I'd try them, too.

Neil, if I can find some Bells of Ireland at a florist or garden center, I'll try them in silica and let you know. I'm a little skeptical, because I've never seen them in the green stage anywhere, and I've seen other information on drieds that I know is untrue, but it would be wonderful to find something in that shade. I tried drying some pale green lisianthus, but they are too fragile. Thank you for your help.

I hope this doesn't sound too silly but when I was a child we colored white carnations with food coloring in some water. That was much longer than I care to think about so I can't remember how the color held up ,but it was lots of fun.

I've used fabric paint in a pump spray bottle to color some faded green dried foilage. I blend two or three different shades to make them look more natural. The green of my air dried Bells of Ireland always faded quickly when it was exposed to light and I suspect it would if dried with silica also.

Pastureprime, I wasn't able to get any Bells of Ireland to experiment with, but I'm sure you're right-if they fade dried naturally, they'll likely do the same silica-dried.
Have you ever tried drying any of the green varieties of roses? If so, did the fade rapidly, too?