- Published: 06 January 2022 06 January 2022
Spring is in the air and for greenhouse growers’ thoughts turn towards planting tomatoes. Tomato plants whether lovingly propagated, gifted or bought are all subject to the same natural laws, in this case rooting temperature. Tomato plants WILL NOT grow new roots at a soil temperature below 59 F –14.5 C. How often do we hear “My tomato plants don’t seem to be growing”. That’s because they are not. The top 1″of soil may be ‘aired’ but 4 -6 inches down the temperature may be 45 -50 degrees. A Soil thermometer is a very useful tool, (Birthday or Christmas Present ?) but it needs to be used carefully and placed some 4″down in the border.