rose verbena

Rose verbena (Glandularia canadensis) is a warm-climate or perennial that should be watered on a regular basis for optimal growth and flowering. Water deeply but infrequently during the spring and summer months to encourage the roots to reach deep and create a stronger, healthier plant. Aim to provide the plant with about 1 inch of water to keep the soil moist, but not soggy, every 7-10 days. During the heat of the summer, more frequent watering may be necessary. In the fall and winter months water only when the soil has become completely dry. Reduce watering frequency in the winter to every third or fourth week.

Rose verbena (Glandularia canadensis) prefers full sun to partial shade, meaning that it should receive at least 6 to 8 hours of sunlight per day. It will tolerate some shade, but it won’t bloom as heavily in those conditions. In the summer months, when the sun is strongest, it’s ideal to provide some afternoon shade – although it’s not absolutely necessary. During the colder winter months, it’s recommended that you provide some shade in areas that receive very intense sunlight.

Rose verbena (Glandularia canadensis) should be pruned when the plants become woody, usually in late winter or early spring. Pruning back stems will help to encourage new growth and maintain the plant’s vigor. Remove up to 1 third of the plant, cutting back just above a node (the point at which the stem branches). As for how much to prune, it will depend on how leggy the plant is and how big it’s become. If your Rose verbena is a bit straggly, you can cut it back fairly hard. If it’s close to flowering, you may want to just take off a few of the longest stems.