Hygrophila polysperma is a so-called “palustrine” aquarium plant with green leaves. The color of the leaves may vary depending on the intensity of the lighting.
In my tray they have a light green color and the top leaves blush a little under the light.
Hygrophila polysperma Care
It is an easy plant, to advise the beginner but it must however respect certain rules: planting the various feet to about 3 cm from each other, so that the light down to the bottom and to avoid leaf rot.
It should also be pruned often: it can be about 15 cm above the ground and replant the cut part. On the stalk, new lateral growth will form.
One can also, if one does not wish to enlarge the solid mass, to push the rod at the level of the ground, until obtaining the desired length. That’s how I size it. On the other hand, hygrophyla regularly makes shoots of itself at ground level.
It will grow even without rich soil (we can compensate by a pellet of fertilizer near the feet) and with a medium light, a PH between 6.5 and 9 and a temperature of 18 to 30 °. A weekly size is necessary because it can reach 20 to 60 cm.
Hygrophila polysperma rosanervig
synonym: hygrophila sunset
Hygrophila rosanervig is native to Asia and very similar to “classic” hygrophyla polysperma. The difference lies in the white veins of its leaves and its pink heads. Initially, the heads are often white, and once they have captured enough light they become pink. This discoloration of the veins comes from a form of virus that is not happily transmitted to other plants.
Hygrophyla rosanervig is also not very demanding for pH, hardness and water temperature, as for conventional hygrophyla polysperma.
On the other hand, it grows less quickly, rather in width and requires more intense lighting. It is essential to plant the different stems within a few centimeters of each other and place it in a very bright area. If the light is not enough, it will grow less safe, but also its leaves will not take this pink color so pretty.
Hygrophila corymbosa “siamensis”
Fast-growing plant with elongated, pointed light green leaves. It grows with twigs, and grows quickly if lighting is sufficient. To cut it you can cut the heads, new shoots will reappear then.
We can also uproot the stem, cut and replant. This method avoids cutting heads that are often very pretty but is more restrictive. In addition, it avoids ending up with bare stems at the bottom. Indeed, this plant tends to lose the leaves of the bottom of the stem.
The soil must be rich and the intense lighting, the leaves of the bottom rot easily if the light does not go down to the foot. The ideal temperature is between 20 and 28 degrees and the pH between 6 and 8.
Pictures of Hygrophila Corymbosa