There’s something particularly satisfying about growing new plants for free. While many gardeners focus on sowing seeds, some of the most useful herbs can be propagated simply by taking cuttings from an established plant. In just a few weeks, a single healthy rosemary, thyme or sage plant can become several, helping you fill your herb garden, containers or allotment without spending a penny on new plants.
Taking cuttings is often quicker than growing herbs from seed and can be a reliable way to increase your stock of favourite plants. It’s also an excellent way to replace older, woody herbs that may be past their best or to share plants with friends and family.
Recently, we took a batch of rosemary cuttings and documented the process step-by-step using propagation modules. Rosemary is one of the most popular culinary herbs grown in British gardens and, once established, provides years of fragrant foliage for both the kitchen and the pollinators.
Why Propagate Herbs From Cuttings?
Many popular herbs are remarkably easy to grow from cuttings. Rather than waiting for seeds to germinate and mature, you can take a piece of stem from an established plant and encourage it to produce roots of its own.
Benefits include:
- Free new plants.
- Faster results than growing from seed.
- Plants identical to the parent.
- Ideal for sharing with friends and family.
- A simple way to replace older, woody herb plants.
Cuttings work particularly well with perennial herbs that develop woody stems over time.
Some of the easiest herbs to propagate include:
- Rosemary
- Thyme
- Sage
- Lavender
- Mint
- Lemon balm
- Oregano
- Marjoram
- Hyssop
While mint and lemon balm will often root readily in water, woody Mediterranean herbs such as rosemary and thyme generally achieve better results when rooted in compost.
Why Use Propagation Modules?
One of the biggest challenges with cuttings comes when it’s time to transplant them. Young roots can be delicate, and removing them from traditional trays or pots can sometimes damage the developing root system.
Bustaseed‘s propagation modules are designed to solve this problem. Each module creates an individual growing space that can be removed cleanly when the cutting is ready for planting on.
This offers several advantages:
- Minimal root disturbance.
- Improved airflow around developing roots.
- Easier monitoring of progress.
- Simpler transplanting.
- Better establishment after potting on.
For gardeners raising multiple cuttings, the modular system also keeps everything neat and organised.
Step-by-Step Guide: Propagating Rosemary Cuttings
Rosemary is one of the most rewarding herbs to propagate. New plants can take a little time to root, but the process itself is straightforward.
What You’ll Need
- A healthy rosemary plant.
- Bustaseed (or other) propagation modules.
- Multipurpose compost mixed with a little grit or perlite.
- Sharp secateurs or scissors.
- Watering can with a fine rose.
- Clear propagator lid or plastic bag (optional).
Step 1: Choose Healthy Stems
Select young, healthy stems from this year’s growth. Avoid flowering shoots if possible, as these will put energy into flower production rather than root development.
Look for stems around 10–15cm (4–6 inches) long that are flexible but beginning to firm up.
This stage of growth is often referred to as “semi-ripe” growth and tends to root very reliably.
Step 2: Take Your Cuttings
Using clean, sharp secateurs, cut just below a leaf node.
Each cutting should be approximately 10cm long.
Take several cuttings rather than relying on a single stem. Even experienced gardeners usually take extras to allow for a few failures.
Step 3: Remove Lower Leaves
Strip the leaves from the lower third of each cutting.
This creates a bare section of stem that will sit beneath the compost surface and produce roots.
Leave plenty of foliage at the top so the cutting can continue photosynthesis.
Step 4: Prepare the Modules
Fill the Bustaseed modules with lightly moistened compost.
A free-draining mix is important. Rosemary dislikes sitting in wet conditions, even when rooting.
Firm the compost gently but don’t compact it too tightly.
Step 5: Insert the Cuttings
Make a small hole with a pencil or dibber and insert the prepared stem.
Firm the compost around the cutting so it remains upright and has good contact with the growing medium.
One cutting per module is ideal, allowing each plant to develop its own root system.
Step 6: Water Gently
Water carefully after planting.
The compost should be moist but not saturated.
Overwatering is one of the most common reasons rosemary cuttings fail.
Step 7: Place in Bright, Indirect Light
Position the modules somewhere bright but out of strong direct sunlight.
A greenhouse, cold frame, windowsill or sheltered greenhouse bench can all work well.
If conditions are particularly warm and dry, covering the cuttings with a propagator lid can help maintain humidity.
Step 8: Be Patient
Rosemary is not the fastest herb to root.
Depending on temperature and growing conditions, roots may take anywhere from four to eight weeks to develop.
During this time:
- Keep compost lightly moist.
- Avoid waterlogging.
- Remove any cuttings that show signs of rot.
- Resist the temptation to tug the stems too often.
A gentle resistance when lightly tugged is usually the first sign that roots are forming.
Step 9: Pot On
Once roots are visible and the cutting is growing strongly, it’s time to move the young plant into a larger pot.
This is where the Bustaseed module system really comes into its own.
Rather than teasing roots apart or tipping plants from a crowded tray, each rooted cutting can be transferred with minimal disturbance, helping maintain growth momentum.
After potting on, keep the young plants watered and sheltered for a week or two before moving them to their final position.
Other Herbs That Root Easily From Cuttings
Thyme
Like rosemary, thyme is best propagated from semi-ripe cuttings during late spring and summer.
Take non-flowering shoots around 5–8cm long and root them in free-draining compost.
Sage
Sage is one of the easiest herbs for beginners.
Cuttings root quickly in warm conditions and establish into productive plants within a single season.
Oregano and Marjoram
These vigorous herbs root readily and can quickly provide enough plants for an entire herb bed.
Mint
Mint almost seems determined to grow.
Stem cuttings root rapidly and often produce roots within days. Keep plants contained, however, as they can spread aggressively once established.
Lemon Balm
A member of the mint family, lemon balm roots readily from soft growth and produces wonderfully scented foliage.
Lavender
Lavender requires slightly more patience but responds very well to semi-ripe cuttings taken during summer.
Using individual modules can significantly reduce transplant shock when potting rooted cuttings on.
Common Mistakes to Avoid
Even easy herbs can fail if conditions aren’t right. Watch out for these common problems:
Overwatering
Most herb cuttings prefer moist compost rather than wet compost. Too much water encourages rot before roots can develop.
Taking Flowering Stems
Flowering shoots direct energy away from root production. Always choose non-flowering growth where possible.
Using Heavy Compost
Dense, water-retentive composts can suffocate developing roots. Adding grit or perlite improves drainage.
Too Much Sun
Fresh cuttings can wilt rapidly in strong sunshine. Bright but indirect light is usually best until roots form.
Not Taking Enough Cuttings
Nature doesn’t guarantee 100% success. Take several cuttings and you’ll greatly improve your chances of ending up with healthy new plants.
A Simple Way to Expand Your Herb Garden
Propagating herbs from cuttings is one of the most cost-effective skills any gardener can learn. With a single mature plant, you can create a steady supply of new herbs year after year, whether for your allotment, garden borders, patio containers or greenhouse.
Rosemary is an excellent place to start, but once you’ve mastered the technique you’ll find the same approach works with many other favourite herbs.
Using dedicated propagation modules makes the process even simpler by reducing root disturbance and helping young plants establish more quickly when moved on.
If you’d like to try the same system we used, visit Bustaseed Propagation Modules and use code JHAG10 for 10% off your order.
A few cuttings taken today could provide enough herbs for years to come.
