Climatic Requirements

Tomato is a warm season crop, it requires warm and cool climate. The plants cannot withstand frost and high humidity. Also light intensity affects pigmentation, fruit colour, fruit set. The plant is highly affected by adverse climatic conditions. It requires different climatic range for seed germination, seedling growth, flower and fruit set, and fruit quality. Temperature below 10⁰C and above 38⁰C adversely affects plant tissues thereby slow down physiological activities. It thrives well in temperature 10⁰C to 30⁰C with optimum range of temperature is 21-24⁰C. The mean temperature below 16⁰C and above 27⁰C are not desirable. The plant doesn't withstand frost, it requires low to medium rainfall, and does well under average monthly temperature of 21 to 23⁰C. Avoid water stress and long dry period as it causes cracking of fruits. Bright sunshine at the time of fruit set helps to develop dark red coloured fruits.

Temperature Requirement

Sr. No.	Stages	Temperature (0C)
		Minimum	Suitable	Maximum
1.	Seed germination	11	16-29	34
2.	Seedling growth	18	21-24	32
3.	Fruit set (day) (night)	10	15-17	30
		18	20-24	30
4.	Red colour development	10	20-24	30