Drosera rotundifolia is a temperate species found in the Northern hemisphere, and as such experiences a total dormancy beginning in early fall when the day length shortens and triggers the formation of a hibernacula by which the plant survives the winter cold. Because of this, the plant is not suited to terrarium culture with other non-dormant and tropical species. It does well under these conditions during its growing period, but would need to be removed and given the same considerations as other temperate species like the sarraceniae, VFT's and other temperate droserae. For me, dormancy is not supported in warmer conditions, although the hibernacula will form on its own as the days shorten. The plant is a bog dweller, often found in live sphagnum, or at the edges of seeps. It likes wet conditions generally, although in habitat it is found in locations slightly less wet than D. intermedia with which it frequently found, and occasionally hybridizes with. The plant self seeds, although the flowers are seldom open. Seed requires a cold, wet stratification for the best germination, and is best sown in late winter or early spring. This species appreciates cool roots while requiring full sun to achieve the deep red coloration and compact petioles typical for the species. In less light, the rosettes will often be green, and the petioles more elongated. I have the best success with my plants growing them outside, where they thrive with a relative humidity above 40%.
