Hi! I've got a large quantity of horsetail rush (equisetum) that I want to try and preserve (I'm a freelance florist, and I ordered too much of it).

I've air-dried some in the past, which works ok, but I'm wondering if anybody's tried to preserve it with glycerin. I got a hold of a lot of it cheaply, so I can experiment.

Is it best to cut the stems and put the ends in a vase of glycerin/water solution, or immerse the whole plant in a vat of the mixture?

Since it's such a 'crunchy' (I don't have a better word for it) plant, will it even soak up the glycerine?

Will they stay green?

How will I know when it's fully 'glycerin-ized'?

Thanks in advance for any advice! -- I apologize for the cross-posting, I'm new to the forum.