For your entertainment, I give you my "Stupid Gardening Mistake" of the year.

I have a long bed that runs down the alley beside my garage which I have planted with four blackberry plants.  The are spaced widely (6 feet apart) so I decided to take advantage of the extra room this year and try planting something in between.  Because the area gets lots of sun and there's a wide pathway that allows a lot of room to ramble, I chose...  watermelon.

Honestly, I don't know why it didn't occur to me that a climbing vine would be a really poor choice to introduce into a blackberry patch.  It's going to be such a huge mess to clean up when I have to prune out the blackberry canes that have fruited.  Not to mention trying to keep the vines off of next year's canes...

At least only one of the four blackberry plants is a thorny type....