The grape harvest begins each year around 10 September. The grapes are picked by hand because the vines are pruned low to the ground and also because the grapes need careful handling in view of the extreme heat. The pickers therefore use small plastic crates that can each hold 39.683205 pound (18 kg) to bring the grapes undamaged to the press. Some bodegas still use the traditional arroba baskets that hold only 24.250847 pound (11.5 kg). Pedro Ximenez and Muscatel grapes are use for the sweet Spanish wines.