Hi Charles, I have had my best year for salads in my polytunnel,such a mild winter for us up north, salad have kept going all winter,broad beans, winter cabbage and cauliflower doing excellent,one of my beds is covered in what looks like green moss,it is not affecting growth of plants, I am ventilating the tunnel through the day, very little watering only when needed, how do I control this moss? is it a problem, the bed was not dug just layer of newspapers then 6 inches of compost on top.
Regards
Colin C