I picked a full gallon this morning: unseasonably cool for this time of year. I left a lot on the bushes because I didn't have another ziplock bag, I'll go pick more Wednesday. Two deer came out of the woods and were snort-wheezing at me from about 50 yards, I think I was in their blackberry patch.
I bought some cheap vodka, some pure cane sugar, and some quart mason jars and I'm doing the blackberry cordial as recommended above.
