I'd like to make a rose petal jam, which requires roughly 14-16 ounces of rose petals. However, I've been warned to not buy roses from florists, due to potential pesticide issues from roses sold for being displayed, not for eating. Is there any place to get fresh rose petals that are organic and/or pesticide free? My guess would be a farmer's market or the like?
You can try organic markets in your area
This is a crap-shoot, but if you have any gardeners who grow roses in your neighborhood it might be worth it to ask around and see if you could buy or barter for some of their flowers. You could also grow your own.
Alternatively, see if there is an organic florist in your area. Interest in organic goods is increasing in North America, and people are getting into this market.
You can get them dried and otherwise processed from Amazon, rose water too. Fresh is going to be a greater challenge. I don't know of a better answer than letting your fingers do the walking or making friends with a gardener.
Of course, if money is no object there is always an option.
http://www.nevadoroses.com/roses/edible-roses/14-edible-roses/er001/P90-edible-roses.html I have not tried them yet, but this looks promising.