Estimate the amount of premix needed for a few pots by filling the molds with dry premix, then pouring it into a plastic tub for mixing. We prepared a batch of concrete and pink concrete pigment (either Tea Rose, Blush, or Morning Mist by Direct Colors) to make several pots at a time in each color. You don’t have to add pigments to the concrete—without it, the planter will be an off-white color.