I just bottled my elderflower 'shampagne' from this season, and I have 3 gallons of still elderflower wine fermenting. My previous attempts over the past few years have not been great, but I have high hopes for this year.
Some comments:
- All elderflowers are not the same. I have a European cultivar (I think Korsor) and 2 American cultivars (Nova and York). Only Korsor has a strong scent, and that's all I have used for my elderflower wines.
- I used ~30 elderflower umbels (~2 US quarts flowers stripped from stems, loosely packed) in a 3-gallon batch. That's plenty for me, but I think it will vary depending on your cultivar, growing conditions and how much you want of that elderflower flavor.
- I recommend 150-200mL grape juice concentrate per gallon, to provide some yeast nutrients and texture to the wine. You will need to add supplemental sugar as well.
- I think many different yeasts will work. I used QA23 this time, I've used DV10 in the past and I'm sure other white wine yeasts will be fine.
- I adjusted pH to 3.17 (targeting 3.1-3.2) using lemon juice, citric acid and tartaric acid. I also included lemon peel (no pith!) for the first ~1 week of fermentation.
- I used my standard grape nutrient addition scheme: 20g/hL Fermaid-O at ~3 brix drop and 20g/hL Fermaid-O at 1/3 brix drop. At the second FMO addition, I racked from primary into a carboy.
- If possible, keep the fermentation relatively cool. Mine has been from 58-63F. This will help to preserve the aromatics.
Some references for elderflower wine (there are many more for elderflower 'shampagne':
https://www.bbcgoodfood.com/recipes/elderflower-winehttps://novocastrianvintnersgazette.wordpress.com/elderflower-wine-recipe/https://www.brewbitz.com/pages/elderflower-wine-recipe
Let us know how it turns out! I hope to post my full recipe if it works out this year...