I've been told somewhere along the way, that if you want to be taken seriously as an artist, your work should be presented in the best possible manner. I really believe this to be so and try to do my best at that. It's neither cheap nor easy to do a nice job of matting and framing your artwork, but it's a necessary part of the process.
The standard for most botanical art pieces is single matting with clean white mat board matching the paper used for the illustration that's visible as the white background. This is what gives botanical art it's clean, traditional style. I know it seems like a lot of white and who knew there were several shades of white watercolor paper (i.e. bright white, natural white, traditional white, etc.) and even more shades of white mat board to match it to! Then you have the problem of keeping all of that white clean and white while mounting and sealing the frame. Be prepared to wear smooth clean gloves or be washing your hands constantly and not cut yourself with the hanging wires or glass, yep- I've done that.
Frames tend to also be simple and classic, though this can depend on the piece and whether it's for a commissioned project, gallery exhibit, or where it might end up. Some artists tend to frame all of their works the same to keep a uniform style while others like to mix it up a bit for contrast. I'm one of the latter tribe I guess, even if it isn't the proper approach. I like simple dark redwood frames for some of my pieces, or rustic white for a more casual vintage look, and sometimes even something with a bit of shiny gilding just makes it more sparkly and fabulous.
I try to do my own framing and matting for my small pieces to save some money where I can, and have a local frame shop tackle the larger works because they have the equipment to do a better job than I do. If you're the one buying the artwork, please take notice of the framing as well, I hope the entire finished piece speaks to you and is a good fit for your home or space. I hope that you love the love I put into creating it for you!