Drosera regia, the King Sundew is a South African and the
worlds largest Drosera, with leaves up to three
feet tall. This giant Sundew occurs only in the South-western
Cape area, where it is rare.
The leaves are erect and narrow, rising from a narrow
base, and widening gradually towards the centre which is
around 8-12 mm wide. They then taper gradually again to a
point. Drosera regia is capable of trapping and wrapping
a large moth. The leaves curl around any captured prey
like a fist. It is an impressive plant with the largest
leaves in the genus. These are rolled in bud, uncurling
to a length of from 25 to 46 cm in sun, or up to 71 cm in
shade. Reportedly, those in cultivation have attained
leaves of a meter in length.
The flowering stem is about as long as the leaves, and
bears a cluster of pale pink to deep purple flowers up to
3-5 cm across, in January; but they may be removed as
they can drain the plant.
Hardiness zones 8-10, (-10°C/15°F, 1°C/35°F) in
Winter. Best grown in a frost free greenhouse.
Windowsills are fine, you may need some extra light for a
happy plant, but it will definitely survive. Do not place
it direct sunlight. It has very thick roots and can be
grown from root cuttings. Temperatures should be kept
between (20°C/25°C, 68°F/76°F). Drosera regia does
not have a dormancy period.
They grow well in a standard peat moss/sand which can be
anything from 50% to 70% peat moss. There's no need to
fertilize, as the plant relies on insects for food. The
humidity should be between 60-80%.
Water must be distilled or rain water because they do not
tolerate city or hard water. It is a good idea to place a
pie pan or large saucer, with about an inch of water in
it, under the pot. This one prefers slightly drier
conditions than most, so it's advisable to let the water
tray dry out before refilling. Elevate the pot by placing
pebbles under it so that the base of the pot is barely in
contact with the water, not submerged; the growing medium
must stay moist, but never soggy. This will keep the
humidity around the plant higher and it will ensure that
the plant has a constant source of moisture.