TCulture Hygrophila Corymbosa ‘Siamensis’ (Pot)

This Hygrophila from Thailand develops under water light green and densely set, lanceolate leaves. The shoots are 15-40+ cm tall and 10-15 cm wide. In open aquariums Hygrophila corymbosa ‘Siamensis’ grows easily above the water surface, where it forms blue-green leaves and small blue flowers. It grows fast and the shoots must be pinched out regularly if you want to keep the plant under water. An extremely hardy plant, suitable for beginners.

Synonyms

Nomaphila siamensis C. B. Clarke

Trader names
Hygrophila siamensis

Complete botanical name

Hygróphila corymbósa (Blume) Lindau

Family
Acanthaceae

Genus
Hygrophila

Difficulty
very easy

Usage
Semi-emersed plant for open tanks, Background, Midground, Street (Dutch style)

Growth
fast

pH value
5 – 7

Temperature tolerance
18 – 30°C

Carbonate hardness
2 – 18°dKH

General hardness
0 – 30°dGH

Propagation
Cuttings

Can grow emersed?
yes

Growing Hygrophila corymbosa ‘Siamensis’ in Singapore tanks

We stock this Thai-origin Hygrophila because it suits the realities of an SG aquarium better than most background stems. Our tap water runs soft and slightly acidic, which Siamensis takes without complaint, and Singapore’s stable 27-29C room temperature sits comfortably within its range, so you rarely need a heater. For HDB and condo aquariums where light is moderate, it still pushes steady vertical growth and fills the rear quickly without demanding high-end gear.

Because it grows fast in our warm conditions, expect to top and replant the shoots often, otherwise it will breach the surface and start sending up emersed leaves. We tell customers to pinch just above a leaf node and replant the cut tops to thicken a hedge. Strong stems mean it shrugs off boisterous tankmates, and its quick nutrient uptake helps keep nitrate and algae in check during the first weeks of a new layout.

It is a forgiving entry into our wider background plants range. New to the genus, read our Hygrophila corymbosa care guide and the variety-specific Siamensis 53B notes, then our trim-and-replant walkthrough for keeping it dense.