How to Grow New Rosemary Plants from Cuttings

How to Grow New Rosemary Plants from Cuttings

One healthy rosemary plant can provide the starting material for several more. With a few fresh stems, small pots, and a little patience, you can grow new plants for your herb garden, patio containers, or gifts.

Growing rosemary from cuttings also lets you reproduce the characteristics of a plant you already enjoy, including its fragrance and upright or trailing habit.

To grow rosemary from cuttings, take healthy, non-flowering shoots about 3–5 inches long, remove the lower leaves, and insert the bare stems into a moist, freely draining propagation mix. Keep them in bright, indirect light while roots develop, then transplant them into individual pots.

Rosemary can also root in water, although starting in a suitable growing medium avoids the later transition from water to potting mix.

Why Grow Rosemary from Cuttings?

Rosemary, botanically known as Salvia rosmarinus and formerly called Rosmarinus officinalis, can be grown from seed. However, stem cuttings are a practical way to increase an existing plant.

Illinois Extension recommends propagation from cuttings and notes that growing rosemary from seed is a slower process. Illinois

Cuttings are particularly useful when you want to:

• Grow more of a favorite rosemary variety.
• Start a small container herb garden.
• Keep a young backup plant.
• Share plants with friends.
• Fill additional pots without buying mature plants.

Start several cuttings if you can. Even with good care, not every stem will root.

When Is the Best Time to Take Rosemary Cuttings?

Late spring and summer are convenient times because rosemary usually has fresh growth available.

Softwood cuttings come from young shoots that are still flexible. Semi-ripe cuttings have a firmer base while their tips remain relatively soft.

The Royal Horticultural Society recommends softwood rosemary cuttings in late spring or summer and semi-ripe cuttings in summer. RHS Guide

Autumn and winter propagation is also possible with suitable material and protected conditions. University of Georgia Extension includes a fall-and-winter method using short, semi-hardwood rosemary tip cuttings in a well-drained rooting medium. UGA Cooperative Extension

For beginners, healthy shoots and suitable growing conditions matter more than choosing an exact calendar date. Cold windowsills, weak winter light, and drying indoor air can make late-season propagation more challenging.

What You Need

Gather your materials before cutting stems so they spend as little time as possible drying out.

You will need:

• A healthy rosemary plant.
• Clean, sharp scissors or pruning snips.
• Small pots with drainage holes.
• Fresh propagation mix or seed-starting mix.
• Perlite if the mix needs additional drainage.
• A pencil or dibber.
• Water.
• Optional rooting hormone labeled for suitable cuttings.
• An optional clear cover for humidity.

Avoid heavy garden soil in small propagation pots. It can compact and remain too wet around the stem bases.

A practical starting medium is equal parts peat-free seed-starting mix and perlite. Moisten it before inserting the cuttings; it should feel damp without dripping.

1. Choose Healthy, Non-Flowering Shoots

Look for vigorous shoots with healthy foliage and no obvious pests, discoloration, or damage.

Choose relatively young growth rather than thick, bark-covered branches. A suitable shoot should be firm enough to handle without being old and rigid.

Avoid stems carrying flowers when possible. If your available shoots have flower buds, remove them during preparation.

Take cuttings early in the day when the plant is well hydrated, and keep them shaded while you work. RHS guidance recommends healthy material, clean tools, and morning collection to reduce wilting. RHS Advice

Do not strip a small parent plant of most of its new growth. Take a modest number of shoots and leave plenty of healthy foliage behind.

2. Cut and Prepare Each Stem

Aim for a cutting approximately 3–5 inches long.

Make a clean cut just below a leaf attachment point, or node. Remove the leaves from the lower portion of the stem while keeping a healthy cluster at the top.

University of Missouri Extension describes herb cuttings of this length, taken just below a node. MU Extension

Prepare each cutting as follows:

1. Trim the stem to a manageable length.
2. Gently remove the lower leaves.
3. Remove flowers or developing flower buds.
4. Keep the leafy tip intact.
5. Plant promptly.

The section entering the growing medium should be free of leaves. Buried foliage can decay and make the rooting environment less healthy.

Handle the stem gently rather than scraping or crushing its base.

3. Use Rooting Hormone if Desired

Rooting hormone is optional, but it can help some cuttings produce roots more consistently.

If you use it, choose a product intended for the type of cutting you are taking and follow its label. Pour a small amount into a separate container rather than dipping cut stems into the original supply.

Apply only the recommended amount to the stem base.

University of California Master Gardeners notes that rooting hormones can improve rooting speed, root numbers, or uniformity in suitable cuttings. They do not replace healthy starting material or appropriate growing conditions. ucanr.edu

There is no need to add sugar, kitchen fertilizer mixtures, or other homemade ingredients to the rooting medium.

4. Insert the Cuttings into the Growing Medium

Fill your pot with the premoistened mix, then use a pencil to make a planting hole.

Insert the bare lower stem deeply enough to hold the cutting upright, keeping all remaining leaves above the surface. Gently firm the mix around it.

Making the hole first helps prevent damage to the stem and avoids rubbing off rooting hormone.

You can place several cuttings in one pot, provided their foliage is not crowded together. Alternatively, use individual small pots so rooted plants need less separating later.

Water lightly to settle the mix, then let excess water drain away.

The goal is an airy, lightly moist root zone—not a constantly saturated pot.

5. Provide Bright Light and Gentle Humidity

Place the cuttings in bright, indirect light. Avoid strong direct sun while they are unrooted, particularly if you use a clear cover.

A loose clear bag or propagator lid can reduce moisture loss. Keep it from resting against the foliage and ventilate if condensation becomes excessive.

Check regularly for:

• Drying growing medium.
• Wilted or discolored shoots.
• Moldy fallen leaves.
• Soft or darkening stem bases.

Remove failing material promptly. Iowa State Extension recommends indirect light, a moist rooting medium, and regular checks for discolored or moldy cuttings. Yard and Garden

Do not place covered cuttings on a hot radiator or in a sealed, sunny windowsill. A small enclosed container can overheat quickly.

How Long Do Rosemary Cuttings Take to Root?

Expect rooting to take weeks rather than days.

A University of California rosemary guide gives approximately 2–5 weeks for softwood cuttings under suitable conditions. Firmer stems, cooler temperatures, or weaker light can extend the process. uccalfresh.ucdavis.edu

Fresh growth is encouraging, but it does not prove that a strong root system has formed. A cutting can briefly produce growth using its stored resources.

Look for roots at drainage holes or check one cutting carefully after several weeks. Avoid repeatedly pulling stems from the mix.

A very gentle tug may reveal resistance, but do not pull hard enough to break new roots.

Can You Root Rosemary Cuttings in Water?

Yes. Water propagation is an option if you want to watch roots develop.

Prepare healthy shoots in the same way, removing enough lower leaves to keep all foliage above the waterline. Place the bare stem bases in a clean jar of water.

Keep the jar in a bright position where it will not overheat. Refresh the water regularly and immediately if it becomes cloudy. Remove any cutting that develops a soft, decaying base.

Once several roots have developed, transfer the cutting carefully into a small pot of freely draining mix. Do not wait for a crowded tangle of long roots.

The University of California rosemary guide includes both water and rooting-medium methods. Neither guarantees that every cutting will succeed. uccalfresh.ucdavis.edu

For a straightforward pot-growing process, starting directly in propagation mix is a useful choice.

When and How to Pot Up Rooted Rosemary

Move cuttings into individual pots when they have a small, developing root system that can support them.

Choose a pot only modestly larger than the roots. A very large container can hold more moisture than a young plant can use.

To transplant:

1. Fill a small pot with freely draining potting mix.
2. Lift the cutting carefully, preserving its roots.
3. Plant at approximately the same depth.
4. Firm gently and water.
5. Allow excess water to drain.

If you used a humidity cover, remove it gradually as the rooted plants adjust to normal room air.

Give them increasing light over time. Established rosemary prefers sun, but a newly rooted cutting needs a gradual transition from its protected propagation conditions.

Caring for Your New Rosemary Plants

Young rosemary needs a slightly different approach from an established outdoor shrub.

Keep the root zone from becoming completely dry while the plant establishes, but allow the surface to begin drying between waterings. Always check the pot rather than watering automatically.

Once the plant is rooted and actively growing, feed only as appropriate for the potting mix and fertilizer label.

Wait until it has produced several healthy new shoots before harvesting. Take small tips at first and leave enough foliage for continued growth.

If moving plants outdoors, acclimate them gradually to stronger light and wind. Protect young cuttings from frost, and check whether your rosemary variety is suitable for permanent outdoor planting in your climate.

Common Rosemary Propagation Problems

The stem turns black or soft:
The base may be rotting. Discard the affected cutting and check drainage, watering, and crowding.

The cutting dries out:
It may be losing moisture faster than it can replace it. Check the medium, reduce harsh sun, and consider a ventilated humidity cover.

The leaves remain green but roots are slow:
Be patient. Cool conditions and mature stems can slow progress. Do not keep disturbing the cutting to inspect it.

The cutting wilts after transplanting:
Its roots may be damaged or not sufficiently developed. Keep it in a sheltered, bright position while it adjusts, without flooding the pot.

Every cutting fails:
Review the starting material and conditions. Try fresh, non-flowering shoots in clean, airy medium rather than repeating the same setup unchanged.

Frequently Asked Questions

Can I grow rosemary from supermarket sprigs?

Sometimes. Fresh, healthy sprigs may root, but older, refrigerated, or dried-out stems can be less reliable. Cuttings taken directly from a healthy plant are a more dependable starting point.

Do rosemary cuttings need rooting hormone?

Not always. Rosemary can root without it, although an appropriate hormone may help. Follow the product label and avoid applying excessive amounts.

Is it better to root rosemary in water or potting mix?

Both methods can work. A freely draining propagation mix lets roots develop in a medium similar to their eventual growing conditions. Water makes roots easier to observe but requires a later transition into potting mix.

Can I take rosemary cuttings in November?

Yes, with suitable shoots and protected conditions. Provide adequate light and avoid cold, saturated pots. Rooting may be slower than during warmer, brighter months.

Can I use an old woody branch?

Very old, thick wood is not the best beginner material. Choose younger shoots, including softwood or semi-ripe growth, for a more manageable propagation attempt.

Do rosemary cuttings need full sun?

Unrooted cuttings are generally managed in bright, indirect light, especially under a cover. Increase sun exposure gradually after they root and begin growing.

How soon can I harvest the new plant?

Wait until it is well rooted and producing several healthy shoots. Begin with light tip harvesting rather than removing a large portion of the young plant.