Plants of ‘Earliglow’ and ‘Kent’ showed similar growth responses (as expressed by dry matter production) to different day/night temperatures (Table 1). The temperature × cultivar interaction for fruit and individual plant parts were significant. Increasing day temperature from 18 to 25°C, while keeping night temperature at 12°C, resulted in greater leaf and petiole growth, but root growth at 25°C was less than at 18°C with a constant day temperature of 25°C, leaves, petioles and roots had less growth with a night temperature of 22 than with 12°C. Dry weights of ‘Kent’ crowns were greater at 25/12 and 25/22°C than at 18/12 and 30/22°C, but this difference was not found for ‘Earliglow’ crowns. Leaf, petiole, crown and root growth decreased at 30/22°C compared to 25/22°C. For both cultivars, strawberry fruit size was greatest with cool day and cool night temperatures (18/12°C). Fruit growth decreased as the day/night temperatures increased. Fruit size was smallest at the highest temperatures.