Threadleaf sundew

Threadleaf sundew Care

Drosera filiformis

What is the plant

Drosera filiformis, commonly known as the thread-leaved sundew, is a small, insectivorous, rosette-forming species of perennial herb. A species of sundew, it is unusual within its genus in that the long, erect leaves of this plant unroll in spirals.

Drosera filiformis, commonly called dew-thread sundew, is a small, carnivorous, herbaceous perennial native to the Atlantic coastal plains of the United States in small, disjunct populations. It can be found growing along bodies of freshwater, in seepage bogs or fens, moist swales between dunes, and sandy, roadside depressions. Thin, narrow, upright leaves reaching up to 8" long emerge from a basal stem. The leaves are covered in red, gland-tipped hairs that exude a sticky substance to trap and break down insects. The leaves unfurl spirally. Thin flowering scapes up to 10" tall emerge from the base of the rosette in summer, bearing multiple pink to purple, 0.75" diameter flowers. Mature plants will form form offsets and clumps will slowly fill a 1' area in ideal conditions.

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Humidity

Normal

Lighting

Full Sun

Temperature

15°C - 27°C

Hardiness zone

7 - 9

Difficulty

Medium

Hibernation

Cold Period

How to Care for the Plant

Water
Sundews require mineral-free water. If your tap water is relatively pure (less than 50 parts per million in dissolved minerals), then you can safely water your sundews with it. Otherwise, use bottled distilled water. Keep the soil wet at all times. You can do this by setting the plant in small amounts of standing water, no more than halfway up the pot.
Sunlight
During the growing season, grow cold-hardy sundews outside in partial to full sun. Provide 4 or more hours of direct sunlight for vigorous growth.
Soil
Use a soil mixture of 1 part peat moss and 1 part perlite. Never use potting soil, compost or fertilizer; these ingredients will kill your plant.

Disease diagnosis

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Temperature
They tolerate the summer heat well. They originate from an area where temperatures above 90°F (32°C) commonly occur in summer. Cold hardy sundews require 3-4 months of winter dormancy triggered by cold temperatures (below 50°F or 10°C) and shorter daylight hours. As your plants enter dormancy, they will drop their leaves and stop growing altogether. While dormant, your plant can withstand overnight frosts down to 20°F (-7°C).
Container
This plant can be grown in a container. Choose a shallow pot with enough drainage holes.
Popularity
71 people already have this plant 36 people have added this plant to their wishlists