I have been monitoring the root temperatures on my Darlingtoia colonies this summer. As part of this I seperated the stolon of a young plant from the Mother colony ( it was in the wrong place) and planted it up in a half tray.
Here is the plant on June 16th.
As it is a half tray it has wider fluctuations in temperature than the larger trays. The maximum root temperature I recorded was 32.4C - 90F.
The same plant on September 8th
As can be seen, the tray is black and the plant sits in water, the trays are flooded.