Yes, the sugar will be wet and clumpy, that’s why it’s important to shake it well, many times a day, to break up clumps and distribute the dampness/help it dry some. It is a very pungent smell (though I wouldn’t call it “decay”). I encourage you to keep shaking many times a day and remember that you will also lay it all out to dry thoroughly and you might be surprised it turns out well and delicious.

I’m having the same issue with my attempt at lilac sugar. After a day or two, the blossoms are brown, the sugar is wet and clumpy, and it smells like decay. I am so sad about this!

Yes, the sugar is always wet and clumpy, since the oils from the bloom are dispersing in the sugar. Shake it often to get the oils spread out. You’ll know if it’s not right as time goes on, but the air drying time will get rid of any dampness and at that stage you’ll know if the flavor isn’t quite right, but mine has always been delicious. Hope it turns out for you!!

Yes! I have occationally still had some left when it’s time to make NEW lilac sugar!

They have! Just this morning, on my way to the coop, I spied 3 tiny open blooms. Most are still buds. But all 3 lilacs are COVERED in buds. I’m so very pleased! I can’t recommend Nature Hills Nursery enough!! I posted this picture of my bloomerangs this morning on facebook.