How to Propagate Rosemary From Cuttings

Rosemary is one of the most rewarding herbs to propagate: cuttings root readily, grow into vigorous clones of the parent, and one healthy bush can give you all the new plants you’ll ever need for free. Because rosemary seed is notoriously slow and erratic — it can take weeks to sprout and often doesn’t come true — cuttings are by far the better route, and they let you preserve a particular plant you like for its flavor, hardiness, or upright shape. The method is simple and forgiving: snip a few healthy, non-flowering stems, strip and trim them, and root them in either a gritty potting mix or a glass of water. This guide walks through the best timing, exactly how to take and prepare the cuttings, both rooting methods, and how to grow a rooted cutting into a strong, bushy plant ready for the garden or kitchen windowsill.

Best Time to Take Rosemary Cuttings

The ideal window is spring through early summer, when rosemary is pushing fresh, vigorous growth and the soft-to-semi-firm new stems root fastest. That said, rosemary is obliging and you can take cuttings successfully through most of the warm season, and even from indoor plants year-round if you provide warmth and light. Avoid taking cuttings in the depths of winter when the plant is dormant and rooting slows to a crawl. Cut in the cool of the morning when the stems are fully hydrated and firm, not in afternoon heat when they’re already a little limp. As always, work from a healthy, pest-free parent — a thriving mother plant gives you robust cuttings, while a struggling one gives you weak ones.

Choosing the Right Stems

The single most important choice is which stems to take. Pick soft, green-to-just-firming new growth from the tips, about 4 to 6 inches long, and avoid old, gray, hard wood, which roots reluctantly and slowly if at all. Choose non-flowering shoots; a stem putting energy into blooms has little left over for making roots. The fresh new growth near the top of the plant — flexible but not floppy — is exactly what you want. Take a few more cuttings than you need, since not every one will strike, and you can always pot up the spares or give them away.

What You’ll Need

• Clean, sharp pruners or scissors (wipe with alcohol first to avoid spreading disease)
• A gritty, free-draining medium: a 50/50 blend of perlite and potting mix, or coarse sand and compost — or a clean glass of water for the water method
• Small pots or a cell tray
• Rooting hormone powder or gel (optional; speeds rooting)
• A clear plastic bag or propagator lid to hold humidity (soil method)
• A dibber, pencil, or chopstick
• A warm, bright spot out of direct sun

Method 1: Rooting in Soil (strongest plants)

Step 1: Take and prepare the cuttings

Snip 4-to-6-inch tips of healthy, non-flowering growth, cutting just below a leaf node where rooting hormones concentrate. Strip the needle-like leaves from the lower half to two-thirds of each cutting — buried leaves rot and breed the fungus that kills cuttings. Pinch out the very soft growing tip to push energy into roots and encourage branching. If using rooting hormone, dip the moistened base and tap off the excess.

Step 2: Insert and cover

Fill pots with the gritty mix and moisten it. Make a hole with a dibber, insert each cutting so the stripped portion is buried and the leafy top sits above the surface, and firm the medium gently around it. Several cuttings can share the edge of one pot. Cover with a clear bag or propagator lid to hold humidity, propping it so it doesn’t touch the leaves, and set the pot somewhere warm and bright but out of direct sun. Keep the medium just damp — never soggy — and vent the cover every day or two to prevent mold. Roots typically form in three to six weeks; new tip growth and gentle resistance to a light tug tell you it’s worked.

Method 2: Rooting in Water (easiest to watch)

Rosemary roots readily in water, which makes it a satisfying, beginner-friendly method — you can watch the roots appear. Prepare the cuttings exactly as above, stripping the lower leaves, then stand them in a glass with an inch or two of clean water, making sure no leaves are submerged (submerged leaves rot and foul the water). Set the glass on a bright windowsill out of harsh direct sun and change the water every few days to keep it fresh and oxygenated. In a few weeks you’ll see white roots emerge. The catch: water roots are more brittle and less adapted to soil than soil-grown roots, so pot the cuttings up into a gritty mix as soon as the roots are an inch or two long, and keep them well watered for a week or two while they adjust. Wait too long and the water roots struggle to transition to soil.

Growing On a Rooted Cutting

Once a cutting has a healthy set of roots and (for soil cuttings) has been hardened off by gradually removing its humidity cover over several days, pot it individually into a small container of free-draining potting mix amended with extra grit or perlite. Grow it on in a bright, sunny spot and water only when the top of the soil dries out — rosemary is a Mediterranean plant that resents constant moisture and will rot or yellow if kept too wet. Pinch the growing tips a few times through the first season to encourage a dense, branching, bushy habit instead of a single leggy stem. Cuttings taken in spring are usually ready to plant out by late summer or the following spring, once all danger of frost has passed; in colder zones, grow rosemary in a pot you can bring indoors over winter. Plant out in full sun and lean, sharply drained soil for the toughest, most flavorful plants. Rosemary is a backbone of any container or small-space herb garden, and the technique here is nearly identical to propagating lavender from cuttings — propagate both at once. For more growing projects, see our outdoor living guides.

Common Mistakes to Avoid

The usual failures are using old woody stems (they barely root), leaving leaves on the buried or submerged portion (they rot and spread fungus), overwatering the medium (rosemary’s roots rot in soggy mix), and leaving water-rooted cuttings in the glass too long so they can’t adapt to soil. Take soft new non-flowering growth, strip the lower leaves, keep the medium just damp or the water fresh, and pot water-rooted cuttings up promptly. Do that and rosemary rewards you with a high strike rate and fast, vigorous plants.