Rosemary is an evergreen plant with narrow, aromatic dark green leaves that are the source of the herb rosemary. It will bear small clusters of light lavender-blue flowers in winter and spring. Rosemary grows quite rapidly, providing shoots that can be clipped and used for seasoning.
Repotting Your Plant
Unwrap your rosemary tree as soon as it arrives. Water the soil if it is dry to the touch. For best results, select a container with drainage holes that is one to two inches larger in diameter than the pot it is currently growing in. Use a good container mix. You may add 10 percent more sand or perlite to the mix for better drainage.
Place the pot in a sunny spot away from drafts. Water regularly, not allowing the soil to dry out. During the cool winter months when the rosemary is in its resting period, the soil will not dry out as quickly and watering should be reduced accordingly.
Rosemary is susceptible to powdery mildew fungus. This fungus appears on young growth as a powdery white substance, usually when it is not receiving adequate light. To control this fungus naturally, we suggest using a wettable sulfate powder such as Remedy Fungicide. Be sure to prune out and destroy any infected branches. The sulfur spray will also help control spider mites.
If aphids or other insects appear, they are hard to kill and must be brushed off with insecticidal soap or neem oil.
Apply a regular houseplant fertilizer at half strength every four weeks through spring and summer. Do not fertilize the rosemary during its winter dormant period.
Pinch back new tips as necessary to retain the plant's shape and to keep it compact and bushy. After a thorough washing, the trimmings may be dried and the leaves used for seasoning. Completely remove any branch that has dried out or died. It is not uncommon for rosemary to occasionally lose branches.
Moving the Rosemary Outdoors
In the spring, when all danger of frost has passed, your rosemary will do best if moved to a lightly shaded area outdoors. Bring the plant indoors each winter before temperatures drop below freezing.