what is the appropriate temperature for tomatoes for outdoors?
<answer> Day temperature is between 65° and 85°F (18-29°C). It will not grow in soil cooler than 55°F (13°C) and it's flowers will not set if the air temperature goes below 55°F . <context> Planting time. Tomatoes grow best when the day temperature is between 65° and 85°F (18-29°C). Tomatoes will not grow in soil cooler than 55°F (13°C) and tomato flowers will not set if the air temperature goes below 55°F .