Can I Put a ZZ Plant in Water for Propagation?

ZZ plants can absolutely be propagated in water, and people do it all the time. Researchers have confirmed that water works as a rooting medium for Zamioculcas zamiifolia cuttings, though it comes with trade-offs compared to rooting in soil or other solid substrates. The process is slow even by ZZ plant standards, and the risks of rot and nutrient deficiency are real, but the appeal of watching roots and tiny rhizomes form through clear glass keeps water propagation popular among houseplant growers.

What Actually Happens When a ZZ Cutting Sits in Water

When you place a ZZ plant cutting in water, the cut end eventually produces roots and a small rhizome, which is the potato-like bulb that stores water and energy for the plant. This process works with individual leaflets (the small oval leaves along a stem), whole leaf stalks (the long compound “branches” that most people think of as stems), or stem sections. Research on leaflet cuttings found that pieces taken from the top, middle, and bottom of a leaf stalk were all equally capable of producing roots and rhizomes, with success rates between 90 and 100 percent when conditions were right.¹ That high success rate, though, was measured in controlled conditions with solid growing media. Water introduces its own complications.

The reason water propagation works at all is that ZZ plant tissue is remarkably self-sufficient. The thick, waxy leaflets and fleshy stems store enough energy and moisture to sustain root development over weeks or months without any external nutrients. The cutting essentially lives off its own reserves while it builds its first roots and a small rhizome. Once that rhizome exists, the plant has a storage organ that can fuel new growth, and eventually a tiny shoot emerges.

Water Versus Soil for ZZ Propagation

A direct comparison in a research setting found that solid substrate produced faster rooting than liquid medium for ZZ plant cuttings.² This matches what most growers observe at home. A leaflet stuck into moist perlite or a well-draining potting mix tends to root and form a rhizome somewhat faster than one sitting in a jar of water. The difference comes down to two things: oxygen availability around the cut surface, and the risk of microbial problems in standing water.

Water that sits for days without being changed becomes a breeding ground for bacteria and fungi. These organisms can attack the soft tissue at the base of a cutting before roots have a chance to form, leading to the mushy brown rot that frustrates so many water-propagation attempts. Research has specifically flagged this microbial contamination risk as a meaningful downside of rooting ZZ cuttings in water, alongside the fact that plain water lacks nutrients needed for strong plantlet development.³ In soil or perlite, the medium provides some physical structure, drains excess moisture, and allows air to reach the cut end, all of which reduce the chance of rot.

So why bother with water at all? Mostly because it is simple, clean, and satisfying to watch. You do not need to buy any special growing medium. You can see exactly when roots appear. And if rot does start, you catch it immediately instead of discovering a dead cutting weeks later when you unpot it. For people who are patient and willing to change the water regularly, the trade-off is worth it.

How to Set Up Water Propagation

The process itself is straightforward, but a few details make a significant difference in success rate.

Start by choosing your cutting. You have two main options: individual leaflets pulled or snipped from a leaf stalk, or an entire leaf stalk cut from the base of the plant. Leaflets are easier to fit in small containers and produce a single small rhizome each. Whole stalks carry more stored energy and can produce a larger rhizome faster, but they need a taller vessel and are more prone to rot because there is more submerged tissue. If you go with leaflets, research suggests it does not matter much whether you take them from the top, middle, or bottom of the stalk; all positions root at comparable rates.¹

Let the cut end dry for a few hours before placing it in water. This brief callusing period helps seal the wound and reduces the chance that bacteria enter the tissue immediately. Then place the cutting in a clean glass or jar with just enough water to cover the bottom centimeter or so of the cut end. You do not want the entire leaflet submerged, only the very base. Use room-temperature water, and keep the container in bright indirect light. Direct sun on a glass of water heats it up and accelerates bacterial growth.

Change the water every few days, or at minimum once a week. Each water change removes bacteria and fungi that have started to multiply. Some growers add a tiny drop of hydrogen peroxide to fresh water to slow microbial growth, though this is anecdotal rather than something that has been formally tested for ZZ propagation specifically. The key principle is well supported by research: keeping the water environment clean is the single most important thing you can do to prevent cutting decay.³

The Timeline Is Longer Than You Expect

ZZ plants are among the slowest houseplants to propagate by any method, and water makes it even slower. Most growers report waiting somewhere between three weeks and three months just to see the first tiny roots. Rhizome formation takes longer still, and a visible new shoot can take six months to a year from the day you placed the cutting in water. If you are used to propagating pothos or tradescantia, where roots can appear in under a week, the ZZ timeline can feel like nothing is happening at all.

Warmth speeds things up. ZZ plants are tropical, and root development is noticeably faster when the ambient temperature stays above about 20°C (68°F). A cutting sitting on a cold windowsill in winter might not show any visible progress for months. If you are propagating in a cooler room, placing the jar on a seedling heat mat can make a real difference.

Light also matters. Research found that ZZ cuttings in liquid medium grew more when exposed to light compared to those kept in the dark.² This does not mean blasting the cutting with full sun, which just cooks it. Bright ambient light from a nearby window or a grow light running for 12 or so hours a day is enough to support the energy-intensive process of root and rhizome development.

Dealing With Rot

Rot is the most common reason water propagation fails. You will know it when you see it: the base of the cutting turns brown or black, becomes soft and mushy, and the water may start to smell. Once rot has spread significantly into the tissue, the cutting is usually beyond saving. But if you catch it early, you can sometimes rescue things by trimming the affected portion with a clean blade, letting the fresh cut callus for a few hours, and placing the cutting in fresh water in a clean container.

Certain cuttings are more vulnerable than others. A leaflet with a damaged base, or one that was not cleanly separated from the stalk, has more exposed tissue for bacteria to enter. Whole stalks are more prone to rot than individual leaflets because the thick fleshy base of the stalk holds more moisture and creates a larger target for microbial attack. Using a sharp, clean knife or scissors rather than tearing the cutting from the plant helps reduce the initial wound size.

Opaque containers can help because they block light from reaching the water, which slows algae growth. Algae itself is not directly harmful to the cutting, but it competes for oxygen in the water and creates a film that can harbor bacteria. If you want to watch roots develop through glass, just keep the jar out of direct sunlight and stay diligent about water changes.

The Miniature Plant Phenomenon

One genuinely interesting quirk of water-rooted ZZ plants is that they often produce unusually small new growth. Researchers experimenting with liquid medium found that ZZ cuttings grown in water developed into miniature plants, which the authors suggested could be marketed as a novel tabletop ornament.² This is not a permanent genetic change; the plant is simply responding to the limited nutrients and different growing conditions of a water environment. When eventually moved to soil, these miniature plants gradually produce larger and more typical growth.

This is actually part of the charm for some growers. A tiny ZZ plant in a small glass vase, with visible roots curling in the water, has a different aesthetic than a potted plant. Some people keep their water-propagated ZZ plants in water semi-permanently as decorative pieces, never intending to pot them up. This is viable for months or even a couple of years, but the plants will remain small and will eventually decline without supplemental nutrients since plain water has nothing to feed long-term growth.³

Transitioning From Water to Soil

If your goal is a full-sized ZZ plant rather than a permanent water decoration, you will eventually want to move the cutting into soil. The best time to do this is after the cutting has developed a visible rhizome and at least a few roots that are a couple of centimeters long. There is no need to wait for a new shoot to appear above the rhizome before transplanting; in fact, the new shoot often emerges more readily once the plant has access to soil nutrients.

The transition itself requires some care because roots that developed in water are structurally different from roots that developed in soil. Water roots tend to be thinner, more brittle, and less adapted to the air pockets in a potting mix. To reduce transplant shock, use a very well-draining mix, something with plenty of perlite or pumice, so the roots do not go from being surrounded by water to being suffocated by heavy, wet soil. Water the newly potted cutting lightly and frequently for the first few weeks rather than drenching it and letting it dry completely, which is the watering pattern you would use for an established ZZ plant. The goal is to keep the root zone consistently moist while the plant adapts to its new medium.

Some growers report losing cuttings during this transition, even after months of successful water rooting. The most common cause is overwatering the newly potted plant in dense soil. The rhizome, accustomed to liquid, can rot quickly if sitting in soggy potting mix. A small pot with drainage holes and a chunky, airy medium gives the best chance of a smooth transition.

Can You Propagate Half a Leaflet

You might wonder whether you can stretch your propagation further by cutting leaflets in half and rooting each piece separately. Research tested exactly this. Half-leaflet segments (both upper halves and lower halves) were able to root and form rhizomes, so the answer is technically yes. But the trade-off was real: half-leaflets produced fewer roots, smaller rhizomes, and smaller new shoots compared to whole leaflets.¹ In practice, the lower success rate and weaker resulting plants make this technique more trouble than it is worth for home growers. You would be better off rooting more whole leaflets than gambling on half-pieces.

This finding is useful to know, though, if you accidentally break a leaflet during handling. You do not need to throw it away. Pop it in water and it has a decent chance of rooting, just know that the resulting plant will be smaller and slower to develop than one grown from an intact leaflet.

How Growth Regulators Change the Equation

Commercial growers and researchers do not rely on plain water or even plain soil for ZZ propagation. They use plant growth regulators, essentially hormones, to steer what the cutting produces. Different hormone combinations applied to ZZ leaflet explants produced dramatically different outcomes: one combination triggered the formation of structures resembling embryos, another produced tubers and roots, another mainly leaves, and yet another mostly roots.⁴ This is how nurseries mass-produce ZZ plants so efficiently: they can chemically direct a tiny piece of tissue to rapidly become a whole plant.

For home growers, the practical takeaway is that rooting hormone powders or gels (widely available at garden centers) can help speed up root initiation on ZZ cuttings, whether in water or soil. These products typically contain a synthetic form of auxin, which is the class of plant hormone most associated with root development. Dipping the cut end in rooting hormone before placing it in water will not guarantee faster results, but many growers find it shaves a few weeks off the waiting period. If you use rooting hormone with water propagation, change the water a bit more frequently, since the powder can cloud the water and contribute to microbial buildup.

Keeping a ZZ Plant in Water Long Term

Growing ZZ plants in water indefinitely, rather than using water as a stepping stone to soil, has become a minor trend in indoor gardening. The plants survive, and the look of exposed roots and rhizomes in a clear vessel appeals to a lot of people. But long-term water culture has limits that are worth understanding.

Plain water has no nitrogen, phosphorus, potassium, or trace minerals. A ZZ plant can coast on the reserves stored in its rhizome and leaflets for a surprisingly long time, but eventually growth stalls and leaves may start to yellow. Adding a very dilute liquid fertilizer to the water (a fraction of the dose recommended for potted plants) can extend the plant’s vigor. However, fertilizer in standing water also feeds algae and bacteria, which circles back to the contamination issue. You end up needing even more frequent water changes to keep things clean.

The other limitation is structural. ZZ plants in soil grow dense, upright, and bushy because the rhizome expands underground and sends up multiple leaf stalks. In water, the rhizome stays small, new shoots are fewer and shorter, and the overall plant remains compact. If that compact look is what you are going for, water culture delivers it nicely. If you want the dramatic arching stems that make ZZ plants so popular as floor plants, soil is the only realistic path.

1
Agriculture and Natural Resources. Effect of position and size of leaflets on rooting and rhizome formation of ZZ plant (Zamioculcas zamiifolia (Lodd.) Engl.) leaflet cuttings
2
Ceylon Journal of Science (Biological Sciences). Development of Rapid Propagation Methods and a Miniature Plant for Export-oriented Foliage, Zamioculcas zamiifolia
3
Ornamental Horticulture. Beyond rooting: Enhancing post-root growth and vigor in ZZ plant (Zamioculcas zamiifolia) through an integrated propagation protocol
4
Scientia Horticulturae. Effect of position and orientation of leaflet explants with respect to plant growth regulators on micropropagation of Zamioculcas zamiifolia Engl. (ZZ)