I bought these hedges at the Lego show. The bases are from the Ikea cardboard box I still salvage for such uses. Originally for railroad modelling but as you can see below they are useful for most scales. You get a metre of hedgerows in the box, I cut them up to 10cm pieces.
Useful for boccages in Normandy or any larger hedges in 15mm.
They fit 1/72s pretty well too.
And 28mm as well.
These redoubts are made from homemade plasticine which dries after a while. I spiked them with pointy match sticks.
I have some 9mm pistol cartridge brass around which I collected a few years back, those shall make excellent defenses for the TYW guns with some greenstuff added.