Return on your seeds

80% of my veg are in the brassica family, I don't grow tomatoes as I can live without them. I do grow a lot of beetroot.

Never really considered seeds verses return

I love brassicas but trying to keep them pest free during summer sends me loopy. Butterflies and moths are easy enough to keep out with netting, but whitefly and especially mealy cabbage aphid get really annoying.