You're right on track. Read the intro thread for recipe formulation, but about 15.25 pounds honey plus water to make 5 gallons will be around 1.110. That plus some fruit sugars will leave a semi-sweet mead. Yum! (If you want to get technical, juice enough plum for a sample and measure the gravity. Usually it'll be something in the 1.030 ballpark but varies a good bit, then we can REALLY dial the sucker in).
I can't picture 24 pounds of plums... how much volume does the fruit take up right now? Just eyeball it. If it's more than about 2+ gallons you can either juice the plums or just refreeze what won't fit. Note that skins and pulp DO lend a character to the mead, maybe you want it and maybe it's a bother. It'll be good either way.
OR make up three or four gallons of must, ferment with the fruit, rack, and add another two gallons (or however much) of the same must and add it then.
Or spring the $15 for another primary bucket . And good on you for not cooking the fruit. Let us know if we can rattle the calculator keys any more!
Bees, brews and fun
in Lyons, CO