Garden Soil Temperature
Posted: Mon Apr 09, 2012 6:12 pm
http://www.durgan.org/URL/?FJMQH 9 April 2012 Soil Temperature
From observations of garden soil temperature over the last few years, it has been ascertained that the temperature about six inches deep is a good guide as to when to start plant seedlings and seed. Before planting I like the temperature to be in the range of 16C to 20C at about a depth of six inches. The temperature rises to about 22C at the heat hight of Summer and is usually around 20C in my area. The top 2 inches can get considerably warmer under a hot Sun. When the Sun is not present the soil temperature quickly assumes a constant 20C with no variation in depth. Pots and containers in a greenhouse can get dangerously warm and it is prudent to monitor them.The probe thermometer is very handy to monitor as required.
From observations of garden soil temperature over the last few years, it has been ascertained that the temperature about six inches deep is a good guide as to when to start plant seedlings and seed. Before planting I like the temperature to be in the range of 16C to 20C at about a depth of six inches. The temperature rises to about 22C at the heat hight of Summer and is usually around 20C in my area. The top 2 inches can get considerably warmer under a hot Sun. When the Sun is not present the soil temperature quickly assumes a constant 20C with no variation in depth. Pots and containers in a greenhouse can get dangerously warm and it is prudent to monitor them.The probe thermometer is very handy to monitor as required.