venting your greenhouse

As 60-degree days approach, remember to ventilate your greenhouse and coldframes. Don’t get working in your wood shop, or go for errands, without opening up your structures some when the weather promises sun and warmth. I’ve too often puttered away on our chicken coop or weeding and forgotten to give some air to all the veggie starts sitting in the greenhouse . . . only to remember mid-afternoon and pull open the door to find a sweat lodge atmosphere. That’s a bit too much moisture.

Here is how we ventilate our plastic-wrapped PVC-piping greenhouse. We built a frame for one end, the top triangle portion of which is attached to the square base. This swings down nicely; a bolt holds it in place when closed.