Ball canning has a canning recipe for strawberry lemonade concentrate. We reached out to them and they indicated that fruits cannot be swapped in this specific recipe.

However, I have a client asking about canning watermelon lemonade concentrate. I'm finding many refrigerator recipes but no canning, so I'm assuming the pH of watermelon may be a concern.  Am I able to make a watermelon lemonade concentrate? Please advise.