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Rosemary care

Rosemary officinalis is a member of the mint family and a native of the Mediterranean whose history trails back to 2500 years. The needle like, gray green foliage with antifungal and antibacterial properties has a pungent, resinous smell that was considered a cure for many ailments. A brush against the plant releases fragrant, aromatic oils that invigorate the senses.
A tender perennial shrub, rosemary will not tolerate temperatures lower than 10F. It can winter over on the West coast growing up to 6ft. tall but in Northern climates it can only be grown in a container.

rosemary in bloom

Care
Outdoors: Rosemary tolerates poor soil with good drainage and full sun to light shade.
Indoors: Place it in bright sunny window and keep the soil evenly moist but not waterlogged. Allow the water to drain freely and let it dry between watering. Brown needles indicate over-watering. In the spring around May 1 repot in fresh soil and set it outside. Slowly acclimate it to the outdoors by keeping it in protected semi shade for 1-2 weeks and then set it on a sunny porch or sink the pot into the ground for the summer. To maintain a compact shape, trim up to 1/2 of any leggy winter growth in the spring. Rosemary needs very little fertilizer during the growing season.

Propagation
Seed germination is very slow; therefore propagation from cuttings in the spring is the preferred method. :
To make new plants, take 4-6 cuttings, strip off lower leaves, dip in rooting hormone and insert in soilless mix. Cover the cuttings with a plastic bag (away from direct sun) to increase humidity. Rooting should take 4-6 weeks. Water rooting is another quick way to propagate rosemary. I have found that cuttings placed in colored blue or green glass root faster than clear glass. Rooting started after 2 weeks.

Wintering Rosemary
The dry indoor air is difficult for Rosemary to endure therefore allow the plant to remain outdoors for as long as possible and bring it inside around end of October. Keep it in a cool (45 degrees is ideal) well ventilated room with a south or west sunny location. Water less in the winter keeping it on the dry side. Try not to get the leaves wet and provide good air circulation to avoid powdery mildew. With a little luck it should make it through the winter, if not you can always purchase a new one in the spring.

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14 comments to Rosemary care

  • Becky Wurm

    Good Evening, I have a question about our Rosemary. It has over wintered outside for the last 2 years. This year it’s all brown and the neddles are falling off, yet the plant itself is not dried up or brittle. Do I need to cut it back ? What do you think I need to do. It’s planted on the south side of our home, so it’s gotten sun all winter. Thanks Becky Wurm

    HI Becky
    If the roots are alive your rosemary should send out new growth between the brown needles. See how much new growth comes back and then cut back any dead or dried stems. It doesn’t hurt to trim the plant as it will become fuller and bushier.

  • Mal

    I recently purchased a potted rosemary plant and I was hoping to keep it hanging indoors in my mudroom for two reasons its nice to look at when you first come in and it smells fabulous. Everything that I am reading is telling me that they don’t do well indoors. Do you have to bring them outside in the summer time or is it possible to keep it an indoor plant?

    Hi Mal
    It’s true that rosemary enjoys the great outdoors. It is possible to keep it as an indoor plant for only a short time. When indoors, it doesn’t get the fresh breeze, humidity,rain and sunshine. Let it go on vacation outdoors, it will grow, be healthier and live longer. I keep mine outdoors for the summer and bring it indoors for the winter to enjoy.

  • Ken Lucas

    We planted a rosemary when we moved to Alamogordo, NM, 3 years ago. It’s been doing great and is about 30 inches wide and 15 inches tall but we just noticed some white,milky, sticky secretions on some of the stalks. Is this a common occurrence or the sign of a problem? We didn’t notice any kind of insects in these secretions.

    Hi Ken
    I’m not sure what you’re describing. Mealy bugs produce a cottony white substance that is sticky and stays between the leaves axils and stems. Could that be what you have? Use a magnifying glass and look closely at the secretion. Let me know what you find. Kris

    • Denise Abdelnour

      Mealy bug
      I live in Arizona and have a 2 foot Rosemary plant that is doing very well until recently. It also has the same white spongy spots between the leaves that you describe. I don’t know what mealy bugs are but I do have some beetle like bugs in the yard. Did you find out what this is?
      You can email me at dpuppi7@hotmail.com
      Thank you.

      Hi Denise
      The safest way is to wash off the mealy bug with a strong spray of water or dip cottom swab in alcohol and dislodge or wipe the mealy bug off the plant.

  • Jiun

    I bought a potted rosemary and have to keep it indoor (i rent an apartment with no balcony). i notice the tips are turning brown. I only water the plant when the soil feels dry, what do you think might have gone wrong?
    thank you!

    Hi Jiun
    It may just be a watering problem. When you water, give the plant a good drink so that the water drains from the bottom (discard excess water)and then wait until the top 2 ” of soil are dry to rewater again. Soil that stays too wet for a prolonged time will cause root rot problems and rosemary seems to like it on the dry side. If the plant is underwatered, the leaves will shrink up slightly. Check the bottom roots, if some are mushy, cut them off and add some fresh soil to the bottom and top of the container. Good luck.

  • Jean

    Hello, I am from Malaysia, I bought a rosemary plant about a foot tall and it’s grown in a clay pot. After 2 weeks I noticed a lot of the leaves turnng black and drop off. I am abit worry. Rosemary plant don’t come easy in Malaysia here. Is it too much or too little water. Please help. Thanks

    Hi Jean
    My guess would be that your rosemary is too wet. A dry rosemary has needles that will get thinner (shrink)and the growing tips start to wilt but perk up after watering. Overwatering can cause root rot triggering the plant to brown and shed its leaves from the bottom up. Rosemary likes slightly alkaline, well-drained, sandy soil that dries quickly. Let the plant dry between waterings.

  • Kelly

    Hi I’m from Malaysia too and was just thinking about planting rosemary. I would like to know where Jean bought her rosemary plant or perhaps you could tell me where?

    Thank you!

    Kelly.

  • Jesse

    I planted a small rosemary in Yuma, AZ a year ago. It went from April to late October, 2008 without water. After watering it has grown rapidly. Can I expect it to continue to grow during the hot summer here without water? Thanks.

    HI Jesse
    Without water, rosemary will stay dormant and not grow. It’s better to water it during the growing season, if you want a larger healthier plant. They should be watered more often in hot weather

  • Shane

    I’m come from Malaysia too…
    and I’m learning culinary arts
    I’ll use a lot of herbs especially Rosemary on my cooking like steak, lamb rack etc.
    I found that if i bought herbs everytime when i need it, the cost was high~
    so i intend to plant some rosemary at my house…
    where can i buy rosemary seeds in Malaysia?

  • Kirstyn

    Rosemary turning brown
    Hi. I’m in Seattle. 7 out of 9 of our rosemary bushes turned brown over the winter. They were probably planted 5 years ago. Any tips on how to save them or should I did them up and plant something else?

    Hi Kirstyn
    Must have been a rough winter. An unusually cold or wet winter can kill rosemary. They need well drained sandy soil, especially in winter so the roots don’t rot. Are they completely dead? Wait and see… If there is some life to it, cut back the brown area and prune to shape the plant.

  • DiAnn

    Hi,
    I live in North Texas. We have had an unusually wet spring season. We moved into this house in January and a rosemary plant is in the front flower bed. It is very large and looked very healthy. Today, however, we noticed some of the branches look to be dead. We have not noticed them being brown and dry at all. It is a beautiful, fragrant, plant and we don’t want ot loose it. We did just add pine mulch to the flower bed last weekend. Is it too wet or something else? Thanks for any help or suggestions.

    Your rosemary plant may be suffering from too much spring rain that is causing some dieback. They like well drained soil. The pine mulch may be adding to the problem since it is helping the soil retain moisture. I would pull it away from the root ball until the soil dries out a bit and then put it back. The other possibility is that it could have sustained some cold winter damage.

  • Kenneth

    Not sure which part of M’sia you guys are in, but, you can buy your rosemary plants in several places. I found mine more often than not in Sungai Buloh. Last week, I found 4 small pots of rosemary in Jaya Jusco 1 Utama, and bought em all.
    Best bet is to try Sungai Buloh and Jaya Jusco Midvalley and 1 Utama.
    PS. I’m still having problems with my rosemary. Bought so many of em now, and have to keep sending them upwards. Seems that in M’sia, you have to give it lots more tlc.

    Part of why they are so difficult to grow may be that its not the right plant for the climate-they are Mediterranean plants.

  • cathy hodder

    should rosemary leaves be sprayed with water during the winter while in the house? I don’t water the soil often but I spray the leaves daily

    Hi Cathy
    There are conflicting theories on spraying rosemary indoors during the winter. You would think that with the dry indoor air the plant would enjoy some moisture. Rosemary likes cool dry air in winter. It can get a special powdery mildew that attacks a healthy plant when it is sprayed with water and little air circulation. Therefore, its better not to spray indoor in winter. I don’t spray my plants and they survive nicely indoors.

  • Sandy Swan

    Hi -

    I live in Seattle and have three beautiful rosemary plants that I put in my rock garden last Spring. They were doing wonderfully - growing, flowering, etc until about March of this year. Now they have all turned white. I really can’t tell if they are dead or not. Two have a few shoots of green, but only a tiny amount. We did have a very unseasonably cold winter. I’m assuming they are pretty much dead, but I LOVE these plants and don’t want to pull them up if there is any way to save them.
    Thanks!

    Hi Sandy,
    You should be seeing some signs of new growth. They may not be completely dead, new growth can also come from the roots.
    Once you determine how much winter dieback you have, trim back the dead stems.

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