Intheswamp said:Ah, but I respectfully disagree about the edibility or economic aspects that you noted, @ElPolloDiablo . 
Roman cauliflowers are €4.90/5.90-kg here. 50 seeds (top quality) are €3.50 and each can grow into something like this.
Sure, you can buy cheaper seeds but germination rates for Brassica sp. is like day and night between quality and cheap seeds. Homemade compost allows me not just to start fertilizing the beds but to save money on taxes as well: I won't bother you on how city taxes are structured here.
Then there are the fertilizers, but I buy big farm formats which save me big money on a per weight basis (25kg of Nitrophoska Gold are less than €40; the standard 4kg bag of NPK fertilizer for homeowners ranges between €10 and 20 according to brand and the robber selling it).
If I had more room and better land/weather I'd be growing much more stuff and save even more money.
I reckon the only thing it would not economically feasible to grow are watermelons, and that's just because prices have been going down for a few years now here.
