The objective of this experiment was to measure, during the seedling stage, the growth and water relations of a mixture of two winter-wheat (Triticum aestivumL.) cultivars: ‘Ponca,’ a drought-sensitive one and ‘KanKing,’ a drought-resistant one. Plants were grown in pots of soil under greenhouse conditions. Pots had one of three combinations of plants: six Ponca plants; three Ponca and three KanKing plants; or six KanKing plants. Half of the pots were watered and half were allowed to dry. Under well-watered conditions, the water potential and osmotic potential of the mixture tended to be intermediate between that of Ponca and KanKing. Under drought, Ponca and KanKing grown together had the highest water and osmotic potentials until the end of the experiment, when soil moisture was depleted. Ponca grown in monoculture and Ponca and KanKing grown together had zero turgor potential at the end of the experiment. KanKing plants grown alone were the only ones to survive the dry conditions. The results showed that when a drought-resistant cultivar was grown together with a drought-sensitive cultivar, the drought-resistant cultivar was unable to survive drought.