Keep in mind when planting that Charleston Gray is thought of as tender, so remember to wait until your soil is warm and the night time temperature is well above freezing before moving outside. Try to keep the ph of your soil between the range of 6.5 and 7.5 as Charleston Gray likes to be in weakly acidic soil - weakly alkaline soil.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Charleston Gray is a tender plant.
Charles Frederick Andrus developed the Charleston Grey in 1954 after trying for some time to produce a disease resistant watermelon.