Yes, hoya in water roots well. Cut a 3–6 inch (8–15 cm) stem with at least two nodes, remove the leaves from the bottom node, and stand it in room-temperature water so the bare node is submerged and the leaves stay dry. Keep it in bright, indirect light at 65–75°F (18–24°C), and change the water weekly or whenever it clouds. Hoya is slower than pothos, so expect several weeks before roots form. Pot it into a fast-draining mix once roots are about 1–2 inches (2.5–5 cm) long, because hoyas prefer to dry out between waterings.
Key takeaway: Never use cold water. N.C. State Extension warns that cold water can shock hoya and recommends room-temperature water every time. And never cut off flower spurs when taking cuttings; they bloom again for years.
| Factor | Recommendation | Source |
|---|---|---|
| Cutting | 3–6 inches (8–15 cm), at least 2 nodes | Iowa State |
| Water | Room temperature; no leaves submerged | N.C. State, UVM |
| Light | Bright indirect light year-round | N.C. State |
| Temperature | 65–75°F (18–24°C) for rooting; never below 45°F (7°C) | Iowa State, UF/IFAS |
| Pot up | Roots about 1 inch (2.5 cm) or more | Iowa State |
| Pets | Listed as non-toxic to cats and dogs | N.C. State |
Can You Root Hoya in Water?
N.C. State Extension says to propagate wax plant (Hoya carnosa) by stem cutting, and its plant photos show roots forming along the stem. UF/IFAS Extension calls it easy to make new hoya plants by rooting stem cuttings, and Iowa State University Extension lists Hoya carnosa among houseplants best propagated by stem cuttings. Water is one of two common rooting methods; University of Vermont Extension notes that rooting in water lets you watch roots develop, while rooting in soil skips the transplant step.
Hoyas are epiphytic vines with woody stems and thick, waxy leaves, which is why they’re called wax plants. That thick tissue stores water, so cuttings rarely wilt, but woody stems also root more slowly than soft ones.
How to Root Hoya in Water, Step by Step
- Choose a healthy vine. Pick firm, green growth, not old bare stems.
- Avoid flower spurs. N.C. State says to leave the peduncles, or spurs, because they produce flowers again for several years.
- Cut 3–6 inches (8–15 cm). Iowa State recommends stems with at least two nodes. Roots form from the nodes, so a leaf alone won’t make a plant.
- Mind the sap. UF/IFAS notes hoyas have milky sap like their milkweed relatives; don’t let it drip on furniture.
- Strip the bottom node. Remove leaves from the lowest node, so the leaves on the cutting stay out of the water.
- Use room-temperature water. Cold water can shock hoya, per N.C. State.
- Bright indirect light and warmth. Iowa State suggests 65–75°F (18–24°C) air for cuttings.
- Change water weekly. Iowa State advises changing water once or twice a week and never letting roots dry out.
How Long Does Hoya Take to Root in Water?
Plan on several weeks. Iowa State says most houseplant stem cuttings root in 3–6 weeks, and woody hoya stems often fall at the slow end. UVM points out that rooting can take days, weeks, or sometimes months; as long as the cutting stays firm and green, keep waiting. Warmth helps more than anything else, so keep the jar away from cold windows in winter.
Moving Hoya in Water to Soil
Iowa State recommends transplanting water-rooted cuttings when roots are about 1 inch (2.5 cm) long. It warns that roots formed in water are coarser and less suited to soil, so newly potted cuttings may wilt or drop leaves before they settle in. Use a well-drained, organic-rich mix; N.C. State lists good drainage and high organic matter. UF/IFAS suggests a hanging basket so vines trail freely.
After potting, UF/IFAS advises watering regularly spring through fall, letting the top third to half of the soil dry completely between waterings, and watering very sparingly in winter.
Can Hoya Live in Water Long Term?
Hoya in water can survive for months, but it isn’t the plant’s preferred long-term home. Hoyas are epiphytes adapted to drying out between waterings, and our sources all describe soil culture with good drainage. If you want to try keeping hoya in water, use a dilute nutrient solution, change it regularly, give bright indirect light, and accept slower growth. For plants that truly thrive in jars, see plants that grow in water.
Hoya Care Tips for Blooms
- Light: Bright indirect light year-round, according to N.C. State. UF/IFAS says too little light is usually why hoyas don’t flower.
- Patience: N.C. State notes most plants won’t flower until 2–3 years old, so a new cutting needs time.
- Keep spurs: Cutting the peduncles removes future flowers.
- Repot rarely: UF/IFAS says repot only when needed, and N.C. State adds not while in bud or flower.
- Temperature: UF/IFAS says avoid temperatures below 45°F (7°C); N.C. State says bring it inside when nights fall below 50°F (10°C).
Troubleshooting Hoya in Water
- No roots after weeks: Too cool or no node underwater. Check that a bare node is submerged.
- Stem rots: Dirty water or leaves submerged. Recut above the soft area.
- Yellow leaves after potting: Overwatering; let the mix dry more.
- Cottony white spots: Mealybugs, which UF/IFAS lists as a common hoya pest; treat with horticultural soap.
Related reading: pothos in water and hydroponic cuttings and cloning.
Hoya in Water vs. Rooting in Perlite
Both methods work, so choose based on what you want. Hoya in water lets you see roots forming, which is satisfying and helps you catch rot early. The downside is the transplant step: Iowa State explains that water roots are coarser and may struggle when potted. Rooting in perlite or a perlite-peat mix avoids that; Iowa State calls perlite a great rooting medium because it balances water and air.
If you root hoya in water, pot it early, when roots are about 1 inch (2.5 cm) long, rather than waiting for a large root mass. Rooting several cuttings at once, some in each method, is an easy way to find what works in your home.
FAQs
Can hoya in water grow permanently?
It can survive for months, but hoyas grow best in fast-draining soil.
How long does hoya take to root in water?
Usually several weeks; warmth speeds it up.
Can a single hoya leaf grow roots?
Don’t count on it; always include a node, since Iowa State’s method relies on nodes and buds to form the new plant.
Is hoya safe for pets?
N.C. State tags Hoya carnosa as non-toxic to cats and dogs.
Why won’t my hoya flower?
Usually too little light, or the plant is under 2–3 years old.
Should I use rooting hormone?
It’s optional; UVM notes it isn’t necessary.
Sources
- N.C. State Extension Plant Toolbox — Hoya carnosa
- UF/IFAS Extension Gardening Solutions — Hoya
- Iowa State University Extension and Outreach — How to Propagate Houseplants by Stem Tip Cuttings
- University of Vermont Extension — More, Please: Propagating Houseplants
- Photo credits (Wikimedia Commons, edited with titles): Hoya carnosa 1 by Acroterion (CC BY-SA 4.0); Hoya FR 2013 by JLPC (CC BY-SA 3.0); Blad van klimop (Hedera helix) 02 by Dominicus Johannes Bergsma (CC BY-SA 3.0); Aloe vera Lanzarote by H. Zell (CC BY-SA 3.0); Sansevieria trifasciata (36268) by Nativeplants garden (CC BY-SA 4.0)