Drosera × hybrida Early Dormancy Is Normal

Why Your Hybrid Sundew Looks Dead in Late Summer

A D. filiformis × intermedia (hybrida) turned brown with little new growth. Good news: it's not dead. This hybrid enters dormancy early—often late summer. Winter resting buds are visible in leaf clusters. Just keep it wet; it will return in spring.

D. anglica behaves similarly. Long dormancy is normal.

— Jeff Dallas, Sarracenia Northwest