Carl Pool's advanced formula BR-61 Plant Food is a special blend of essential nutrients and minerals specifically designed to promote healthy growth, maximum flower buds, and larger, more colorful blossoms. BR-61's high phosphorous formula also supplies necessary micro-nutrients that are sometimes lacking in soils and potting mixes. BR-61 supplies the vital elements needed to sustain optimum plant growth and flowering, and it encourages strong root development of newly planted trees, shrubs, bedding plants, and newly seeded or sodded lawns.