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.
Germination Time. Rosemary seed takes 15 to 25 days to germinate under ideal conditions. Plant the seed about 1/4 inch deep in a well-draining germination mix. Water thoroughly and place the seed tray on a heating mat. Only about 30 percent of the seeds can be expected to germinate even under the best conditions, so plant seeds thickly.