Cautions. Any risk factor for hemorrhage (eg, subacute bacterial endocarditis, blood dyscrasias, menorrhagia, dissecting aneurysm, major surgery, spinal anesthesia, hemophilia, GI ulcerative lesions, liver disease, impaired hemostasis).
How to Grow Rosemary â Harvesting. You can start to harvest your rosemary when it is 4 to 6 inches tall. However, do not prune it excessively until it is at least 8 to 10 inches tall. You can use rosemary directly out of your garden to add fresh seasoning to almost any dish.
Rosemary requires only sunlight, good drainage and ample air circulation. A sandy, well draining soil and 6 to 8 hours of full sunlight daily will have the plants off and running in no time. There is little need to fertilize the plants. A basic 5-10-5 fertilizer applied in the spring and perhaps a foliar spray mid season will keep the plants healthy and happy.