<Alt Text 1 of 4>
Today’s plant of interest is Rosemary (Salvia rosmarinus), formerly (Rosmarinus officinalis). The botanical Latin name change occurred in 2017 when genetic studies revealed that Rosemary was very closely related to the Sage (Salvia sp.) genus. Which makes sense because both are intensely aromatic, take similar growing conditions and share the same pests. By the way, both Rosemary and Salvia belong to the Mint (Lamiaceae) family, so when I say the Mint Family is huge I am not exaggerating. In the test gardens I happen to have both of the forms of Rosemary; prostrate and upright forms, which guarantees my kitchen is never short of the critical aromatic herb. Now, before we go any further, I just have to clarify the word ‘Prostrate’ means ‘to lay oneself flat on the ground, face downward especially in reverence’, and is not to be confused with the word ‘Prostate’ which is the organ that guys have. Why is a Rosemary referred to as prostrate you ask? It is because that form of rosemary creeps along the ground and is used as a groundcover so it grows prostrate on the ground. The scientific name of Prostrate Rosemary (Salvia rosmarinus ‘Prostratus’) and, there are a lot of these plants on the market that didn’t quite get the message that they are supposed to be low-growing as well as hybrids that are semi-upright but still sold as if they’re a ground cover. Regardless of which form you grow Rosemary is not hard to grow in our climate, in fact when compared to Oregano, it’s the second easiest herb you can grow. Rosemary doesn’t mind sandy dry low-fertility soils; our heat is no problem nor is our humidity or temperature range. It does prefer full sun but will tolerate partial sun exposure but, unlike a bunch of other herbs, it doesn’t care if that partial sun is morning sun or afternoon sun. Literally Rosemary in zone 8 is something you plant and barely have to do anything for as it will form a shrub that is 2-4 feet tall
<Alt Text 1 of 4>
<Alt Text 2 of 4>
with a similar width in just a few years. Obviously if you care for it by providing compost, fertilizer and irrigation it will grow to that size faster. Another benefit of this herb is that it is resistant to deer damage and is very salt and becomes very drought tolerant after the plants have had a few months to settle in. As if that were not enough, after a few years your Rosemary might just bloom and it will usually do it in the cold months. As you can see in the included pictures one of my Upright Rosemary plants decided to bloom and it’s a wonderful shade of blue. The flowers provide nectar and pollen to whatever pollinators are up and running at the moment so there’s a benefit for me and for them. The flowers don’t really have a detectable scent but considering every inch of the plant otherwise is coated in essential oils that are aromatic that is an acceptable state of lacking. For me personally Rosemary has been one of those herbs that have been in every single garden I’ve ever built for myself or for paying customers even when I knew the winters were cold enough to kill it every year. Part of this is the that the cost of buying dried or fresh rosemary at the supermarket was always outrageous; Harris Teeter for instance charges about $3.00 per ounce dried for their brand. Fresh Bundles of Rosemary go for the same price there but once you remove the leaves you are getting less than an ounce. Once you start looking at name brand dried Rosemary the cost per ounce goes up and dried Rosemary is a sick joke anyway. Fresh Rosemary is where it’s at from a culinary perspective, its aromatic, and as you handle it the scent gets on your clothes your skin and when you cook with it, it scents up your entire home especially when paired with fresh tomatoes. Typically in colder climates where winter kill is an issue, you could plant sheer numbers of rosemary and use the usual tricks of adjacent stonework and mulch to hope the roots stay
<Alt Text 2 of 4>
<Alt Text 3 of 4>
alive. This unfortunately is a numbers game and you rapidly hit diminishing returns. You could bring a rosemary plant in for the winter, but it needs a warm sunny window that gets at least eight hours of light which isn’t always doable. As I noted before Rosemary is in the Mint family, and that means every inch of stem could potentially form roots and so taking cuttings might allow you to clone your plant before the winter moves in. In warmer climates like our own, every three to five years, your rosemary shrub will benefit from a major cut back. After a certain point Rosemary will start to get bare or dead areas inside of it and those areas may allow rot to move into the stems which damages the vigor of the plant. By cutting it back by two-thirds every three to five years and fertilizing right after you essentially cause the plant to do a full regeneration, this process is called rejuvenation pruning and it works on a lot of other shrubs such as Azaleas, Privets and Crape Myrtles. Rosemary for all its virtues does suffer from a few pest problems, but the ones you’re likely to encounter in the southeast are Mint Moths, Spittlebugs Spider Mites and Whiteflies.
<Alt Text 3 of 4>
<Alt Text 4 of 4>
Mint Moths also attack Sage and any other Mint family member, but you can spot their webbing on Rosemary and Sage real easy and remove the caterpillars by hand or use Neem Oil. Spittle bugs aren’t so much of a pest but their mucousy bubble nests for their eggs are super gross and can be destroyed with a shot of water from the hose. Spider mites are indicated by a presence of speckled leaves and can be wiped out with neem oil. Lastly, are the Whiteflies, a true scourge of the Southeast because they reproduce fast and can become resistant to pesticides in less than a growing season. Also whitefly go airborne if disturbed making it hard to use contact pesticides on them. However alternating between Neem Oil and Horticultural oil can keep them controlled until then end of the season or when they die in cold weather. There are a few final things to be said about Rosemary that you folks out there need to know. The extra cold hardy variety is called ‘Arp’, if you want Pink Flowers look for ‘Majorica Pink’, if you want golden variegations look for ‘Gold Dust’ and if you want a variety of Rosemary where the stems are straight so you can use them as skewers look for ‘Barbeque’. Rosemary is also a critical ingredient of Four Thieves Vinegar which was used during the Black Plague to prevent contracting the disease. Lastly, the Companion plants that go with Rosemary are noted in several sources to be Lavender, Alyssum, Sage, Thyme, Marjoram, Borage, Zinnias, The cabbage Family, and Strawberries.
<Alt Text 4 of 4>
The Wild Harvest Digest: March 2026, #2
Good Morning Neighbors,
In today’s post we’re going to take a brief break from the topic of Companion Planting because something out in the garden has made itself worth talking about. #AromaticHerbs #Rosemary