Are silk flower petals tacky?

Rule of thumb when using fake flowers is as long as guest can't feel or touch them it's all good. So I think silk on the aisle is okay.

Typically the colors and textures that I see for artificial petals tend to LOOK artificial. Mostly, I see the artificial petals with both fabric and sheer looking petals, which aren’t natural looking all (especially the sheer ones). But, even if you’re doing DIY for the rest of your flowers, maybe think about ordering a bag of real petals from the florist.

You can also get bags of real rose petals through the Costco website (see floral section).

I think you'll get the visual effect you want using the silk petals to line the aisles, that sounds like a good idea to keep things easy to clean up