Growing jalapeno plants starts with caring for your soil. Mix organic fertilizer with your soil in a ratio of two parts soil to one part fertilizer. Use potting soil that contains perlite to prevent the soil from becoming too compacted.Perlite also helps hold water and releases it slowly into the soil.rowing jalapeno plants starts with caring for your soil. Mix organic fertilizer with your soil in a ratio of two parts soil to one part fertilizer. Use potting soil that contains perlite to prevent the soil from becoming too compacted.