Jef79answered grow question 5 years ago Hello.. Hope you are well.. I assume u mean ur room temperature.. Anywer between (day temp) 18-27°c depending on species.. Nite temp i wudnt go lower than 15°c but again different plants prefer different temps.. Lower nite temps will bring out colours if any in the genetics from red-pink-purple and even black!!
I also notice in ur dairy ur feeding at a low temp.. Try giving ur plants a feed at 18° and ur roots mite appreciate it a little more.. Stay safe n gud luck.. 👍