Rosmarinus officinalis (Rosemary)

Also known as Salvia rosmarinus. It requires any well drained soil in full sun. It forms low arching branches, bearing blue rosemary flowers from about May onwards. Pinch the tips to keep it bushy and provide fresh herbs for the kitchen. If the plant does require pruning, it is better to do this little and often to avoid cutting into the old wood, which can sometimes cause dieback. It is an excellent coastal plant.

This plant is susceptible to powdery mildew which is an endemic air-born fungal. It is easy to treat and we recommend the following action is taken as soon as you notice the white powdery residue on the leaves (usually worst in the inner part of the plant). Give the plant a good clip, removing as much of the affected parts as possible without cutting too hard into the central branch structure. Clean up thoroughly and remove all rubbish from the area then spray with a general purpose ready to use systemic fungicide, one that contains myclobutanil. Be sure to follow the instructions carefully and repeat treatments as necessary. This protects and cures and so can be used regularly if needed.