Propagating Hygrophila balsamica

How to propagate Hygrophila balsamica, the fine feathery-leaved stem plant, by topping cuttings that root quickly while the base splits into bushy side shoots.

Overview

Hygrophila balsamica is a stem plant in the family Acanthaceae with finely divided, feathery leaves resembling small ferns. Like other hygrophilas it propagates readily from cuttings, growing into a large bushy background plant. It is reported to be poisonous when grown emersed and may leak toxins into the water, so keep it fully submersed in the aquarium.

Propagation Method (Cuttings)

All hygrophilas propagate easily by cuttings, and balsamica is no exception. Cut the stem at an internode a couple of inches from the top, strip the lowest set of leaves, and plant the cut end into the substrate where it grows new roots from the lowest internode. The original rooted base then pushes out fresh side shoots even after the top is removed.

Step-by-Step

Select a healthy stem and cut a 5-10 cm top section just above an internode.
Strip the leaves from the lowest one or two internodes of the cutting.
Push the bare end firmly into the substrate so the buried internode can root.
Trim the parent stem low to encourage it to split into two bushy branches.
Within a couple of weeks the cutting roots and the base sends out new shoots.

Conditions for Healthy Growth

Balsamica is easy in low-tech and intermediate setups and does not require CO2, though brighter light and nutrient-rich substrate produce denser, faster growth. It is a tropical species, so keep it warm. Rich substrate feeds the fibrous roots and supports its tall, feathery habit.

Trimming & Maintenance

To build a fuller bush, trim the plant low and it will split into two branches at the cut, multiplying stems over successive trims. Each top you remove is usable as a cutting, so regular topping doubles as propagation. Trim roughly every two weeks to keep the background dense and shapely.

Common Challenges

Emersed growth is reported as poisonous and may foul the water, so avoid emersed culture in display tanks.
Without enough light the feathery lower leaves thin out and the stem grows leggy.
Tall fast growth needs frequent topping or it shades plants beneath it.