I have a question about soil temp. I have indoor plants and heard on HGT I should keep the soil 10 degrees cooler than ambient air temp. I have no idea how to do it. Has anyone else tried to do this and how did you do it? Thanks
You do not have to do this. The soil will be the same temp as the plant. Perhaps this might make a difference in hydroponics, but in soil you just need to be in mid 70's and low 80's depending on what you have growing.