Space (without an atmosphere) near the Earth either too hot or too cold. The Moon gets up to 127°C during in the sunlight and -173° when during a lunar night.

Space (without an atmosphere) near the Earth either too hot or too cold. The Moon gets up to 127°C during in the sunlight and -173° when during a lunar night. My guess is you would use Dyson Trees inside hollowed out asteroids that are rotating, with the axis of rotation constantly pointing towards the sun. The window that lets the sunlight through (and keeps the new atmosphere in) could be adapted so the trees do not get too hot. You could also have an asteroid on a circular orbit around the Sun at a distance of 1.7AU. There, in constant daylight the temperature should be just right (300°K, 26°C) when constantly facing the Sun.