Snow Pea Pleas

I'm not sure if my neighbour caught me, but I spent a great part of the early morning pleading with the snowpeas. The are an impressive height, growing on a much better trellis than last year (see this post for how not to trellis snow peas) and they are green with tendrils grasping in every direction. What they lack though, is kind of fundamental, they have not flowered and thus have not produced any edibles. While the dwarf snow peas are going great guns and have kept me in green stir fry bliss, these mammoth melting peas from last year are next to useless. While the snails have munched away at them they remain yet to produce human food (unless you count sprouts, which I don't unless I'm in the mood for making salad and being a hypocrite.)

What is the go here mr snow pea? Too much nitrogen? (your smaller bushier brothers seem to cope just fine) Dodgy seed? (but you germinated) Soil depth too low? (you survived harsher conditions last year) Is the balcony garden just playing silly tricks on me? Well it better start producing soon, or it's getting ripped out to make way for, well, not sure what I can plant at this time of the year, probably more snow peas!!!