Well, I have started saving the cardboard inners from toilet rolls, should have enough for all my runners and climbing French beans (Maybe along with a few from Christmas wrapping) for all my runners and climbing French beans. I stand them upright in a large margarine tub and fill with compost, then plant the bean in the bit that sticks up above the edge of the tub. That way I can water wildly without leaving the bean actually in standing water. The roots come through the tube into the surrounding compost, but they still make for easy planting. I plant everything separately, I see things like sweet peas planted a dozen in a container the size of a cup and think 'Yes, they are tough, they will recover, but why give them all that stress when they are small?'