Forest Fantasy Dresses

In my opinion, Fawn by Azazie seems to have that forest vibe.

https://www.azazie.com/products/azazie-fawn-wedding-dress?color=diamond-white&from=searchrelate&q=fawn&from_type=search_related_products

I've tried a few of their wedding dresses and they have pretty good materials and construction. It doesn't look like a $1,000+ dress, but that's the tradeoff when the prices are so affordable.

Try searching for woodsy, romantic white dresses (do not include the word wedding or bridal) - you should find lots of results. I wouldn't try looking for a typical "wedding dress".

You can look at JJshouse. Look in both bridal and evening wear. A lot of their evening wear dresses can come in white and may have something close to what you are looking for

Etsy has some fantastic dressmakers with this sort of vibe! Just make sure you check out their reviews and customer submitted photos of their work!