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Crassula natans – Floating Pigmyweed

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Scientific Name

Crassula natans Thunb.

Common Names

Floating Pigmyweed

Synonyms

Crassula natans var. natans, Crassula natans subsp. natans, Crassula levynsiae, Helophytum natans

Family: Crassulaceae
Subfamily: Crassuloideae 
Genus: Crassula

Description

Crassula natans is an annual, aquatic succulent herb. It has decumbent filiform branches up to 4 inches (10 cm) long, often multi-branched when growing in marshy area, or slender floating branches up to 10 inches (25 cm) long. The leaves are linear shaped, up to 0.3 inch (8 mm) long and in marsh plants, or for floating plants up to 0.6 inch (1.5 cm) long. It blooms between July and November, producing white-pink flowers.

Photo via inaturalist.org

Hardiness

It is grown as an annual plant, so it has no USDA hardiness zone.

How to Grow and Care

Crassula are easy to grow, but they are susceptible to mealy bugs and fungal diseases. As with all succulents, overwatering is sure to be fatal, so err on the side of too dry rather than too wet. Never let your Crassula sit in water. If you water from beneath by letting the plant sit in a saucer of water, make sure to pour off any excess water after a few minutes.

Crassula are generally started by division, offsets or leaf cuttings. Plants can be easily propagated from a single leaf: sprout leaves by placing them into a succulent or cacti mix, then covering the dish until they sprout.

Repot as needed, preferably during the warm season. To repot a succulent, make sure the soil is dry before repotting, then gently remove the pot. Knock away the old soil from the roots, making sure to remove any rotted or dead roots in the process. Treat any cuts with a fungicide. Place the plant in its new pot and backfill with potting soil, spreading the roots out as you repot. Leave the plant dry for a week or so, then begin to water lightly to reduce the risk of root rot… – See more at: How to Grow and Care for Crassula

Origin

Native to the wetlands of Cape Fold area of the Western Cape region of South Africa.

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