Broad bean (final. hopefully!)

I've never done well with broad beans. Fact. I've tried to grow them for 5 consecutive years and never had much success. 

This is the last sowing for this year - 6 plants (3 green, 3 crimson), which I started in the greenhouse and put outside last weekend. 

I planted them under the bean tunnel, amongst (now wormy) kitchen waste which I'd usually dig in a trench in early spring but I can't dig so the coffee sack "mulch" will have to do.

I recently read a French permaculture book in which the organic gardener advised just adding kitchen waste directly on the soil as ground cover, I guess I could say this is my take on it.