Just south of Épernay, a 12-mile-long, chalk-covered ridge rises from the countryside. The hill is covered in 7,500 acres of vines, 97% of which is Chardonnay. This is the Côtes des Blancs, the most iconic sub-region of Champagne's smallest major growing area (also of the same name). While one might assume that the region was named for the white grapes that decorate the hillside, the Côtes des Blancs takes its moniker from the bright white soils rich with chalk. These unique soils are prime for growing Chardonnay. The chalk provides a reliable water source for the wines; it’s porous enough to prevent vines from being waterlogged and absorbent enough to retain water through dry spells. The white color of the soil also reflects heat from the sun up into the canopy, which aids in fruit ripening. Champagne is generally a cold growing region, so this added boost of heat and light is hugely beneficial.