How to Propagate Rosemary Cuttings in Water

By James Wilson · January 23, 2026

To propagate rosemary cuttings in water, select a healthy 4-6 inch stem, remove the lower leaves, and place it in a clean jar of water. Keep it in bright, indirect light and change the water every 2-3 days. Roots typically develop within 2–4 weeks, after which the cutting can be potted in soil.

Why Propagate Rosemary in Water?

Water propagation is a simple, low-cost method ideal for beginners. It allows you to visually monitor root development and ensures high success rates when done correctly. Rosemary (Rosmarinus officinalis) responds well to this technique, especially when using non-woody, actively growing stems.

Benefits of Water Propagation

Easy to observe root growth
No need for specialized soil or pots initially
Higher moisture control compared to soil
Minimal equipment required

Step-by-Step Guide to Propagating Rosemary Cuttings in Water

Follow these proven steps to successfully grow new rosemary plants from cuttings using water.

Selecting the Right Cutting

Choose a healthy, disease-free rosemary plant. Look for green, flexible stems rather than woody ones.

Length: 4–6 inches (10–15 cm)
Source: Non-flowering side shoots
Time of year: Spring or early summer (April–June) yields best results

Preparing the Cutting

Cut just below a leaf node using sterilized scissors or pruning shears.
Remove leaves from the bottom 2–3 inches to prevent submersion and rot.
Optional: Dip the cut end in rooting hormone to accelerate root formation.

Placing the Cutting in Water

Use a clean glass or jar with room-temperature water.
Ensure only the stem (not leaves) is submerged.
Place in bright, indirect sunlight—avoid direct afternoon sun.
Change water every 2–3 days to prevent bacterial growth.

Root Development Timeline

Days After Propagation	Root Development Stage	Water Change Frequency	Light Requirements
0–3	Cut preparation and placement	Initial fill	Bright indirect light
4–7	Callus formation at cut end	Every 3 days	6–8 hours/day indirect light
8–14	Initial root buds visible	Every 2–3 days	Consistent indirect light
15–21	Roots 0.5–1 inch long	Every 2 days	Avoid direct sun
22–28	Ready for transplanting (roots ≥1 inch)	Before potting	Maintain until transplant

Table data source:1, 2

The table shows that consistent care during the first three weeks is critical for successful root initiation. Most rosemary cuttings develop transplant-ready roots within 3–4 weeks under optimal conditions, with regular water changes and proper lighting significantly reducing failure rates due to rot or dehydration.

Transplanting Rooted Rosemary Cuttings

Once roots reach at least 1 inch (2.5 cm), the cutting is ready for soil.

Pot in well-draining mix (e.g., sandy loam or cactus soil)
Use a container with drainage holes
Keep soil moist but not wet for the first week
Acclimate gradually to full sun over 7–10 days

Tips for Success and Common Mistakes to Avoid

Best Practices

Use sterile tools to prevent infection
Label each cutting if propagating multiple herbs
Maintain stable temperatures between 65–75°F (18–24°C)

Common Pitfalls

Using old or woody stems – reduces rooting success
Leaving leaves in water – promotes mold and rot
Infrequent water changes – leads to stagnation and bacterial growth
Direct sunlight exposure – overheats water and damages tissue

Frequently Asked Questions About Propagating Rosemary Cuttings in Water

How long does it take for rosemary cuttings to root in water?

Rosemary cuttings typically develop roots within 2 to 4 weeks when kept in optimal conditions—bright indirect light, clean water changed every 2–3 days, and temperatures between 65–75°F (18–24°C).

Can I propagate rosemary in water without rooting hormone?

Yes, rosemary can root successfully in water without rooting hormone. While hormone powder may speed up root initiation by 5–7 days, it's not essential for success, especially with fresh, healthy cuttings taken in spring.

Do rosemary cuttings need sunlight to root in water?

Yes, but only bright indirect light. Direct sunlight can overheat the water and damage the cutting, while too little light slows root development. A south- or east-facing windowsill (with filtered light) is ideal.

Why is my rosemary cutting rotting in water?

Rotten stems are usually caused by leaving leaves submerged, using unclean containers, or infrequent water changes. Always remove lower leaves, use fresh water every 2–3 days, and ensure the jar is sanitized before use.

Can I grow rosemary from grocery store sprigs in water?

Sprigs from the grocery store may root, but success rates are lower (around 30–40%) due to age, transport stress, and potential wax coatings. For best results, use cuttings from a living plant grown in soil.