All three of the bags have tomatoes and onion/garlic borders but I also plant chillies, lettuce, beetroot or carrots. The one in the photo contains tomatoes, garlic (about to be harvested), onions (about to be harvested), lettuce, plus a couple of things (squash/marrow?) that popped up out of the compost added to the bag earlier in the year. Throughout the year there is always something growing in these bags, which are in our permaculture zone 1.
I add a thin layer of my own compost to the top twice a year and when stuff starts to actively grow I water them once a week with a very dilute feed of comfrey fertiliser (around 1:100). I've stopped the liquid feed now as I have added some shredded comfrey leaves to the surface.
I was thinking the other day that I wasn't having many problem with pests in the bags. I assumed it was because of the the mix of veg I had planted and the onion-garlic borders. Then this morning I spotted a frog, no doubt just having finished her breakfast and thereby zapping a few more pests for me. This is the third frog I've seen hopping around the garden. We don't have a pond - just some areas that are shady and covered in foliage, a couple of wood piles, and a few plant pot saucers containing water dotted around.
So, the veg bags are still looking good and I'll probably continue using them until they fall apart.