When the pH of soil is high, it’s too alkaline. u003cstrongu003eHigh pH means that certain nutrients become less soluble and therefore less available to plants.u003c/strongu003e This results in nutrient deficiencies such as calcium, iron, copper, and phosphorus.u003cbr/u003eu003cbr/u003eAlkaline soil can have similar symptoms to acidic soil such as brown tips, wilted leaves, leaf necrosis, blossom end rot, and irregular colouring or spotting.