Everything You Need to Know About Growing Rosemary (2024)

Jayme Henderson

Jayme Henderson

Jayme is an aspiring wine-maker and Certified Sommelier, and when away from the restaurant, she can be found in the garden or the kitchen. She blogs at Holly & Flora, where she writes about cultivating, co*cktailing, and creating, from garden to glass.

published Jul 25, 2015

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Everything You Need to Know About Growing Rosemary (1)

When I think of rosemary, I imagine the rolling hillsides in the south of France, peppered with wild rosemary bushes. I just want to pour myself a glass of rosé, sit poolside, and take in its resinous aroma. Rosemary is not only about aesthetics, though — it adds a flavorful finishing touch to many a savory dish, like grilled lamb, roasted chicken, or toasty focaccia.

Rosemary is easy to grow, evergreen in many climates, and it thrives in containers. There’s no excuse why you shouldn’t be growing some of your own.

Why Should I Grow Rosemary?

Regardless of your growing zone, rosemary (Rosmarinus officinalis) is a garden necessity. In warmer areas, this pungent, evergreen plant makes a beautiful, strong statement as a hedge or a graceful addition to a rock garden. In cooler areas, rosemary is the perfect candidate for container gardening, as long as it receives the sunlight and well-drained soil it craves.

Rosemary is also a low-maintenance herb for its ability to live, for the most part, pest-free. Your only concern might be powdery mildew, which you can avoid by not overwatering and by providing adequate space and air circulation among its neighboring plants.

Excited to enjoy your first snip of this fragrant culinary herb? I advise skipping on purchasing the small starts of rosemary. Get a head start and pay the extra couple of dollars for a larger plant. Although rosemary can reach a sizable dimension, it is a slow-grower in its first year.

How to Plant Rosemary

  • Where: In warmer zones, plant perennial rosemary within landscaping as a hedge or find a trailing variety and plant within a rock garden. If you live in a cooler zone, like I do, you may plant your rosemary within your garden, but when the first frost hits, be prepared to either harvest your leaves or transplant your rosemary to a container and bring it indoors. I find the best way to grow rosemary in a cooler zone is to keep your rosemary mobile. Doing this equates to year-round enjoyment of this aromatic herb.
  • When: I purchased the rosemary plants you see in these photos from my favorite garden center in mid-May. I lost a couple to a very late freeze this past spring, so I had to start from scratch. From these two plants, I am currently rooting a few cuttings, in hopes of a larger harvest next summer. If you’re just starting out, it’s best to start cuttings indoors eight weeks before the first scheduled frost, and wait to transfer to garden soil until it reaches 70°F. If you live in zone six or higher, plant rosemary whenever you’d like.

How to Cultivate Rosemary

  • Soil: Plant rosemary in well-drained, loamy soil that is between a pH of six and seven. Although rosemary will perform well in poor soil, I find that adding fertilizer to the soil each spring aids in its growth.
  • Sun: Rosemary needs six to eight hours of sunlight each day. When planting rosemary indoors, be sure that its sunlight needs are met. This may mean supplementing with artificial light.
  • Water: Similar to hardy sage, rosemary is relatively drought-tolerant. Let the soil dry out between each watering; rosemary does its best when the soil is not overly moist.
  • Spacing: In warmer growing areas, zones eight and further south, rosemary can grow into a thick, large, hedge-like plant, making it necessary to space each plant up to three-feet apart. In areas more susceptible to frost, I suggest planting rosemary in containers, in order to grow the herb year-round.
  • Companion planting: Plant rosemary near carrots, cabbages, and sage. Rosemary also deters a lot of bean parasites. Depending upon where I plant my beans, I make sure I place a container of rosemary nearby.
  • Propagation: Clip a three-inch cutting from the very tip of a stem, remove the leaves one inch from the base, apply rooting hormone on the exposed portion of the stem, and plant it in a rooting mixture that includes both peat moss and vermiculite. Roots will emerge within three to four weeks. Transfer to a small (four-inch) pot, let the root ball form, and then transfer to a larger pot or directly to your garden.

How to Harvest Rosemary

Harvest rosemary whenever you need it. Its pine needle-like leaves grow thickly along its stems, so there isn’t necessarily a perfect spot to cut it. The plant will naturally branch off from wherever you clip. Just don’t clip an entire stem all the way back to the base of the plant; you want to encourage future growth. Then again, if you live in a warmer area, your main concern might be containing this vigorous grower.

I’m curious how some of you grow your rosemary. Since I’m in zone four, every inch of rosemary I get is a cherished celebration. How do those of you, who live in warmer zones, deal with your excess? Be sure to check back tomorrow for a few of my favorite ways to preserve rosemary.

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gardening

herbs

Everything You Need to Know About Growing Rosemary (2024)

FAQs

Everything You Need to Know About Growing Rosemary? ›

Rosemary grows best in a sunny spot that has soil with sharp drainage. Make sure no taller trees or shrubs in the area are so close that they will shade the rosemary. Good companion plants for rosemary are cruciferous vegetables (kale, cabbage, broccoli, cauliflower, Brussels sprouts), beans, and carrots, and spinach.

What is the trick to growing rosemary? ›

Choose a planting site with light, well-drained soil. Rosemary hates having wet roots, especially in winter. So if you have heavy soil, plant rosemary in raised beds, where drainage will be better, or in containers. Space rosemary plants at least 45cm (18in) apart.

What are the cons of rosemary plants? ›

Rosemary generally has few pest problems, although it can be attacked by aphids, spider mites, mealybugs or scales. Root rot and botrytis are the most common disease problems. The biggest cause of plant decline and death is overwatering.

Where not to plant rosemary? ›

It is generally recommended to avoid planting rosemary near vegetables that are prone to fungal diseases. Some vegetables that should not be planted near rosemary include broccoli, Brussels sprouts, cabbage, and cauliflower.

Is rosemary a high maintenance plant? ›

Everyday watering is a no-no. Rosemary is known as the “upside-down plant. “ This is because it loves the soil to be on the dry side, but prefers its greenery to be a little moist (it absorbs a lot of water through the leaves).

How do you encourage rosemary to spread? ›

Promote spectacular growth by feeding rosemary regularly with a water-soluble plant food. It's important to water regularly but be sure to let the soil dry out between waterings. Harvest rosemary stems by snipping them with sharp gardening shears.

When should you avoid rosemary? ›

Because higher doses of rosemary may cause miscarriage, pregnant and nursing women should not take rosemary as a supplement. But it is safe to eat as a spice in food. People with high blood pressure, ulcers, Crohn's disease, or ulcerative colitis should not take rosemary.

Is rosemary hard to keep alive? ›

However, maintaining a rosemary plant indoors can be a little tricky. During the winter, warm and dry air inside homes can wither its leaves and desiccate the twigs. Rosemary needs cool and moist conditions in wintertime, as well as a good amount of sunlight (or artificial light that doesn't emit heat).

What will happen if I drink rosemary water every day? ›

Rosemary tea is considered to be very safe, however drinking it in large quantities can result in nausea and vomiting. Essential oils should not be applied directly to the skin, as it can cause dermal irritation.

Is rosemary better in pots or ground? ›

Grow rosemary in well-drained soil in full sun. Young plants can suffer if their roots are sitting in wet soil in winter, so it's a good idea to grow rosemary in a container for a couple of years before planting into the garden.

What is the best companion plant for rosemary? ›

The best companion plants for rosemary

Rosemary can thrive in rich soils, but only if they are freely-draining. Herbs like lavender (Lavandula), sage (Salvia officinalis), thyme (Thymus vulgaris), oregano (Origanum vulgare), and marjoram (Origanum majorana) grow nicely together with rosemary in a pot or a raised bed.

What is the problem with rosemary plant? ›

Fungal Diseases of Rosemary

The most common fungal diseases are root rot and powdery mildew. The latter occurs in warm, wet periods and is characterized by a dusting of whitish, fine spores on all parts of the plant. It is most prevalent when the plant is in semi-shade and temperatures are 60 to 80 degrees F.

Why do I keep killing rosemary? ›

Remember, rosemary is a cliffside native; it craves well-draining soil and a light touch with the watering can. So, if you're drowning it in love (and water), you're actually setting the stage for root rot to crash the party. Keep it breezy, keep it dry-ish, and your rosemary will thank you by not dying.

Where is the best place to plant rosemary? ›

If you're growing rosemary as an annual or a potted plant, try growing it indoors. This can be challenging since rosemary likes it hot and dry with plenty of sun. So in the home, make sure plants are in full sun if possible—southern exposure is best. Container plants need a well-draining potting mix that's light.

Does rosemary grow back every year? ›

Rosemary is often grown as an annual in cool climates, but it can grow as a perennial in warmer areas. With proper care, perennial rosemary plants can grow into large, 6-foot-tall shrubs that can live for more than 30 years.

How do you care for potted rosemary? ›

Rosemary does well in containers in a soil-based, peat-free compost. Add crocks to the bottom of pots to aid drainage. Keep rosemary plants well watered during dry spells and feed with a general fertiliser during the growing season. In cold winters, bring plants under cover for protection.

Can rosemary plants get too much sun? ›

Rosemary basking in the sun might sound idyllic, but too much of a good thing can lead to stress. Look out for leaf discoloration—a telltale sign. Leaves may turn a pale, washed-out green or develop yellow, white, or brown patches, indicating sunburn.

Is it better to propagate rosemary in water or soil? ›

Rooting rosemary in soil takes a little more time than water propagation, but it's handy because the cuttings root in pots and may not need to be transplanted later on.

Does rosemary like full sun or shade? ›

Even when grown outdoors, rosemary is best suited to full sunlight (at least six hours per day) and it is only moderately tolerant of shade. This can cause issues when the plant is grown (or moved) indoors, where it is difficult to achieve the right sunlight conditions, especially during the short winter months.

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