I decided against super glue as too expensive. Regular white glue however proved too runny, sliding off the sides of the grape mounds. Plus I buy it in a big jug, decant and brush on, adding to the complexity.
However, Mrs. Rabbitman came to my rescue, telling me of a craft glue called Aleene's Tacky Glue. It is what it says on the bottle. White glue but thicker and stickier.
Fortunately there is a craft store not too far away. So I bought glue and Mrs. Rabbitman bought yarn. After much delay I could finally settle down to several hours of Netflix and get stuck in!
It probably took me about 6 to 8 hours of gluing over about three days.
Here's some of them in front of a grape hut with the new Taliban for effect.
As you can see there's quite a few, and I still have half the bag of clump foliage left.
These should make the battlefield more complex.