What's the point, Steve, the glass is so easily removed. You could drill a hole in the side of the door and in the adjacent frame and thread a padlock through it I suppose. The door of our bulbhouse is usually open for ventilation 24/7 anyway, weather permitting.

you said it was your shed that was targeted? they probably thought there was valuables in there,whereas your greenhouse to them had no saleable items?

Good points BH/Kev this is the first time around our crescent this has happened on reflection these people would not have a clue what these bulbs are and how much they are worth anyway Joey our new dog is really good at doing is barking job.