One way to beat the winter blues is to have plants growing in a sunny window.
Rosemary is an evergreen plant (Rosmarinus officinalis) belonging to the mint family. It blooms clusters of small, light blue flowers. Fun fact – the name rosemary comes from the Latin word rosmarinus, meaning “dew of the sea,” suggesting its native origin around the Mediterranean Sea.
Although there are some Rosemary cultivars that are supposedly hard to zone 6 (‘Arp’), none will survive our harsh mountain winters, so the best thing to do is grow it a pot, put it outside in a sunny spot in the summer, and bring it in for the winter.
Use a fast-draining soil mix and an unglazed clay pot. Place pots on a saucer or tray, and water thoroughly until the water drains through. Do not leave the plant standing in water for more than an hour. You will have to experiment a bit with how often to water – it will depend on temperature, size of the plant, and the amount of sun. Mine seems to prefer a nice soaking once a week during the winter (and much more frequently in the summer). Overwatering is one of the leading causes of death in the winter due to root rot– but don’t under water, either (all the leaves will dessicate and fall off). Stick your finger into the soil – if it still feels wet an inch or so down, wait a few days before watering.
If you’ve got the light and watering down, the next biggest problem is powdery mildew. If the window where you have your plant does not get good circulation, you can aim a small electric fan at the plant. Do not mist plants and avoid wetting the leaves when watering. At the first sign of infection, isolate the plant. Remove and dispose of all infected plant parts. Severely infected plants may need to be discarded. You can try spraying with a solution of 1 tablespoon baking soda dissolved in 1 quart of water (or perhaps even 2Tbs full fat milk and 1 cup water), but don’t use any products that aren’t labeled as safe for consumption if you plan on using your rosemary in food!
Enjoy