Essential pH management in greenhouse crops - part 1: pH and plant nutrition

Your goal as a greenhouse grower is to maintain a stable pH over the life of the crop. This is not an easy task since many factors can affect pH in the growing substrate. The pH can go up or down within several weeks of the crop cycle and if you wait for deficiency or toxicity symptoms to develop, you have already compromised the health of the crop and your profits. Knowing all factors involved is the first step to managing the substrate pH.