About a month ago, I cast a pair of these 16"w x 9"h troughs for my friend Noel. The 2"h feet are separate, of course.
The troughs are cast around a 12"w x 7"h piece of sonotube filled with sand. I cast them upside-down.
I used the hammer drill to make some drainage holes once they were cured.
And yes, it rained a couple inches this week and cooled off about 10 degrees.
I cast a couple more large troughs yesterday and planted some mums in the garden today. I'm back!