Often times a newcomer to greenhouses will not be able to figure out what he is doing wrong. It’s warm in his greenhouse, he waters the plants everyday and yet the plants are not doing too great. They are wilted or have mold growing up their stalks.
Usually improper ventilation is the culprit. During the hot summer months a greenhouse can bake plants, the heat is even stifling for the gardener. In humid climates the greenhouse will become muggy, in dry climates it feels like an oven. Greenhouse ventilation keeps air flowing and keeps humidity and temperature in check.
Carbon dioxide is crucial for plants but fatal to humans. Keeping gas exchanges regulated with ventilation is easy. Installing a few vents and adding fans is all that is needed to allow plants to breathe and to let humidity escape. Vents can be purchased at a relatively low cost and installing them just requires a few cuts in the greenhouse.
