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How to divide a phlox plant
Determine when to divide phlox.
Divide phlox while it still looks healthy. The most common mistake home gardeners make when growing phlox is waiting until the plant shows signs of failing or over-crowding before they divide it.

a). Obviously phlox plants can't dry out on their own, as they only need to be divided once in order to grow them. Phlox typically need to be divided once per year..
b). It can be done by toterminating the phlox and planting it in a group, or by having the plant grow indoors or outdoors. You can buy a stock pot from a gardening supply store, or use your hands to dig up phlox leaves, and sow them in the ground if needed..
c). As a rule of thumb, allow the diameter of the plant cluster to grow to the same width as the plant's height before dividing it. Divide the phlox sooner if the plant becomes over-crowded, or if the center of the plant fails to bloom and produces less foliage..
d). Scientists have demonstrated that corn production could take months or longer than plants grown without phlox. If you're growing phlox with corn, consult your species carefully to make sure it's healthy enough to work together..
c).