Tomatoes grow without greenhouse thermometer

Tomato thermophilic, planting without greenhouse thermometer. Tomato family warm for 13 - 28℃； By low temperature exercise, short time ( Within 48 hours) The lowest temperature - 1℃； The highest temperature of 38 ℃. Assimilation 20 - the optimum temperature 25℃； Temperature below 15 ℃, slow growth and can blossom or bad pollination; 5 ℃ stem leaf growth to stop; 1 ℃ below began to freeze to death; Tomato is not heat resistant, above 30 ℃ respiration consumption is greater than the accumulation of assimilation; More than 35 ℃ blossom; 40 ℃ stop growing; 42 ℃, humidity below 50% May burn seedlings. Tomato seed germination minimum temperature of 10 ℃, 35 ℃, the highest 28 - the most appropriate 32℃； Seedling period shall not be less than 13 ℃, minimum temperature shall not be higher than 33 ℃, otherwise affect the flower bud differentiation; Flowering period of 25 ℃ in the daytime and nighttime 17 ℃ is best; Results 25 during the day - 28 ℃, 16 - at night 20℃； 19 - 24 ℃ is conducive to the formation of lycopene, below 15 ℃ or above 30 ℃ are not conducive to the formation of lycopene. Tomato root growth of the optimum temperature from 20 to 22 ℃; The minimum ground temperature 8 ℃, the highest for 32 ℃, so the spring tomato transplanting time should be stable ground temperature reaches more than 8 ℃. Choose a suitable greenhouse thermometer on tomato cultivation is very necessary. MMG - 3 a maximum and minimum thermometer, the product name: maximum and minimum thermometer, thermometer, greenhouse thermometer use areas: greenhouses, the meteorological department, specifications, such as description: models: MMG - Three types: structural style of the maximum and minimum thermometer: can flip eaves, circular button material: beige ABS shell shape size: 22 * 13 cm temperature range: - 40 - 50 c, red and black single calibration accuracy: + / - Packing: 1 c 100 shipping/box, 50 / box only four express delivery, the product characteristic: the maximum and minimum thermometer is used to record in a certain period of time the maximum temperature and minimum temperature in air five, maintenance notice: in use. Transportation. Storage should be upright, not from vibration so as not to cause of the use of mercury.