Anubias looks its best when it appears to have claimed a piece of stone over time: broad leaves rising from a crevice, roots gradually gripping the surface, and no obvious tie point in sight. Knowing how to attach Anubias to rocks properly gives you that natural result while protecting the part of the plant that matters most - the rhizome.
Unlike stem plants, Anubias should not be planted deeply in substrate. Its thick, horizontal rhizome needs water flow and light around it. Cover it with gravel or aquasoil and it can rot, even when the leaves look healthy for a while. Attaching it to carefully selected hardscape solves that problem and turns a simple plant into a lasting feature of the layout.
What You Need Before Attaching Anubias
Start with a stable aquarium-safe rock and a healthy Anubias plant. Rinse loose dust from the rock before it enters the aquarium, especially if it has been stored or handled during your hardscape build. You do not need to sterilize it with soap or household cleaners. Those residues are difficult to remove and have no place in a planted tank.
Inspect the plant before mounting it. The rhizome is the firm, green to dark-green horizontal stem from which leaves grow upward and roots grow downward. Remove any yellowing leaves, but do not aggressively trim healthy roots. Long roots can be tucked into cracks or left exposed. They will eventually grip the rock on their own.
For most aquascapes, you need just one attachment method: cyanoacrylate gel glue, cotton thread, or clear fishing line. The best choice depends on the shape of your rock, the size of the plant, and whether you want the attachment to disappear quickly.
How to Attach Anubias to Rocks With Glue
Aquarium hobbyists often choose cyanoacrylate gel because it is fast, clean, and nearly invisible once the plant settles in. Look for plain cyanoacrylate gel with no added fragrance, color, or mold-resistant ingredients. This is the same active ingredient found in many aquarium plant adhesives.
Take the rock out of the tank and blot the intended attachment area until it is mostly dry. The rock does not need to be perfectly dry, but glue bonds more reliably when it is not dripping. Blot the roots and the underside of the rhizome as well.
Apply two or three very small dots of gel to the rock. Press the plant's roots, or a small section of the underside of the rhizome, onto those dots for about 20 to 30 seconds. Do not coat the entire rhizome in glue. The goal is to hold the plant in position, not entomb it.
Once the plant is secure, return the rock to the aquarium. Cyanoacrylate may form a temporary white haze where it cures underwater. This is harmless and usually becomes unnoticeable as biofilm, moss, or new roots cover the area.
Glue is especially useful for small Anubias nana petite, narrow-leaf varieties, and detailed hardscape work where a visible tie would distract from the composition. It is less ideal when mounting a large, heavy clump onto a smooth vertical face. In that situation, thread or line offers more support while roots establish.
Use Less Glue Than You Think
The most common glue mistake is using too much. A thick blob can look artificial, trap debris, and make it harder to reposition the plant. Small contact points work better. After several weeks, the Anubias roots will take over the job and the glue becomes irrelevant.
If you place a dot in the wrong spot, let it cure, then gently shave or scrape it from the rock outside the aquarium. Avoid pulling hard on a freshly glued rhizome. It is better to sacrifice a little glue than damage the plant's growing point.
Attaching Anubias With Thread or Fishing Line
Thread and fishing line are excellent options for irregular rocks, larger plants, and hardscape you want to adjust before committing to a final placement. Both methods hold the plant gently against the stone until the roots grip.
Cotton thread is the more natural-looking short-term option. Wrap it around the rock and across the roots two or three times, then tie it snugly without crushing the rhizome. Over time, cotton breaks down underwater. By then, a healthy Anubias should have attached itself to the rock.
Clear fishing line lasts longer and offers more security, but it requires a little more care. Wrap it tightly enough that the plant cannot float away, then trim the ends close to the knot. Keep the line off new leaves and avoid cinching directly across the rhizome. As roots grow, check that the line is not cutting into tissue.
Thread is usually the better choice for a natural stone arrangement where the plant will remain untouched for months. Fishing line makes sense for a high-flow aquarium, a large Anubias specimen, or a rock with very few crevices. Both can be removed later once the roots are firmly anchored.
Use the Rock's Shape to Your Advantage
The strongest attachment often comes from placement, not adhesive. Look for a crack, pocket, ridge, or undercut where the rhizome can sit naturally. Tuck the roots into that feature and use glue or thread only as a light anchor. This creates a more convincing planted-stone effect and helps the plant stay put during maintenance.
Think about viewing angle before attaching anything. Anubias leaves naturally turn toward available light, so a plant mounted on the front of a rock may eventually obscure the stone's texture. Position larger varieties along the midground or at the base of a focal stone, where their bold leaves can soften transitions between substrate and hardscape.
Smaller varieties work beautifully on branchy rock, accent stones, and detailed foreground features. A few petite plants can bring scale to a large layout, but avoid covering every available surface. Premium hardscape should still be visible. The contrast between exposed stone and established plant growth is what gives an aquascape depth.
Keep the Rhizome Above the Substrate
After the rock goes into the tank, make sure the rhizome remains exposed. You can bury the roots slightly in surrounding substrate if they naturally reach down, but the rhizome itself must stay above the surface. If the rock settles after planting, lift or reposition it rather than letting the substrate creep over the plant.
This rule matters even in a mature aquarium. Detritus can accumulate around the base of hardscape, particularly in low-flow areas. During routine maintenance, gently fan debris away with a pipette or turkey baster and make sure the rhizome still has open water around it.
Anubias is forgiving, but it is not invincible. A mushy, dark, or foul-smelling rhizome signals rot. Remove the damaged section with clean scissors, keeping any firm healthy portion intact, then reattach it to a clean area of rock.
What to Expect After Mounting
Newly attached Anubias may pause before producing fresh growth. That is normal. It is adapting to the new aquarium, light level, and water chemistry while it begins to establish roots. Do not keep moving it in search of a faster response. Stable placement is one of the advantages of mounting Anubias on rock in the first place.
Moderate light is usually enough. Under intense lighting, slow-growing Anubias leaves can collect algae before the plant has time to replace them. If algae becomes persistent, reduce the light period, improve circulation around the hardscape, and maintain consistent fertilization and water changes. Do not assume more light will make Anubias grow faster.
A thoughtfully chosen stone can make even one small plant feel intentional. At Aqua Rocks Colorado, we see the best results when hobbyists choose hardscape with natural texture, stable footing, and enough detail to give roots somewhere to disappear. Attach the plant lightly, leave the rhizome open, and give it time. The most convincing Anubias-covered rocks are not forced into place - they are allowed to grow into the aquascape.
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