Sorry for the late response, I've been away from the computer for a while.
Don't hold me to it, but I believe I have heard of Jasmine wine. I have never tried it, but I would check with a local extension agency and/or library to make sure they are edible.
(You get the drift from all my posts that you should
thoroughly check this before you start.)
If it is edible, I would pick another quart or two. It's always best to have double of everything before you make it (called Martina's rule in my mind). It's a lot easier to tone things down than to beef them up after thefact (take, for example, my lavender and pumpkin wines).I think I woulduse 2 loosely packed quarts to one gallon of wine.
Now, this is my methodology in doing flower-petal wines: Since I usually realize things "after-the-fact" try this. Pick the petals off the bud of the flower and put them in a measuring cup while your doing it. Don't wash them yet. Just throw what you pluck off into the measuring cup. For every full cup, write down the amount you have. I have a terrible memory, and I forgot to do this a few times. So, lots of variation was in my wines before I did this. Once you have the grand total, dump all of the petals in a strainer. Run cold water over them and dump them into a sanitized straining bag. Put the straining bagin a zip-lock or other baggie to freeze them. Let them freeze for at least a week, but 2 is better. When you are ready to make the wine, all you need to do is take the frozen petals out of the freezer and into the primary and go on with your recipe as usual.
If
you can, this is what
I do when making a new wine that I've actually picked from flowers: Pick all that you can. If you pick just enough for 1 gallon, you can only make one gallon. Then you might just have to wait a year before making another one like it. Sad, if you only made one gallon = 4-5 bottles if racking goes right. Now if you pick enough to make 2 gallons, you've got 10 bottles, if all goes well. That sounds pretty good (one bottle every 6 weeks for a year!) to me.
A lot of people ask me about how much sugar I put into my wines. I never know the exact amount because I strictly rely on my hydrometer for this. I usually aim for 1.080 or 1.090 and add sugar until I hit that number. 1.090 is a little on the high side, but it is certainly worth considering if you plan to top up with water, which I often do.
I hope this helps, and I'm sorry for the very late response. Please, let me know how this turns out, because I am very interested in this one!