Growth Retardent See Growth Regulator . At the very least, the Guaranteed Analysis must provide the percentages of the primary elements as well as their sources. In addition, the Guaranteed Analysis may also list the availability of other essential elements and trace elements . On African Violets and other plants, cells which are grouped in pairs on the epidermis . These cells expand and constrict to regulate the opening and closing of the stomata .
Flowers are purple and white.
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