How to Prune double-leaved sundew?
Trim off faded top growth in late autumn

double-leaved sundew · Drosera binata
Also known as: old man's eyebrow
Under glass, grow in mix of equal parts fertiliser-free peat substitute and sand, in full light with shade from hot sun. The compost should be kept continually moist in the growing season by standing the container in a tray of soft (lime-free) water, such as rainwater. During the winter, plants enter a period of dormancy so keep plants moist, not sodden. Outdoors grow in wet, peaty, acidic, nutritionally poor soil in full sun. See Carnivorous plant cultivation
Trim off faded top growth in late autumn