Some fresh-market growers have significantly increased yields by planting double rows on black plastic mulch, with trickle irrigation laid under the plastic. This provides uniform moisture and fertility during the growing season. Also, extra magnesium and calcium nitrate can be added through the drip tubes. Merlin Lime and Fertilizer Maintain a soil pH between 6.0-6.8. Peppers do best on a friable, well-drained, warm soil.
Acid soils lead to problems such as calcium deficiency, blossom end rot and magnesium deficiency.
Peppers do not require high soil fertility, but they also should not be starved. They need a constant supply of nutrients throughout the growing season. Fertilization too early results in excessive vine growth and limited fruit production. Some of this nitrogen can be applied in two or three sidedressings that should begin 2-3 weeks after transplanting. Starters provide phosphorus, which helps in early flowering and greater yields.