![]() ![]() Hardy in USDA zones 7-11, plants grow 3-6’ tall and 1-3’ wide. bonariensis), also known as tall verbena, is an upright form with purple flowers. Here are some of the most commonly grown: Plants can be trimmed at any time if they outgrow their space. Trailing and groundcover types can be trimmed back several times during the growing season to stimulate new growth and flowers. Learn more in this guide to fertilizing annual plants. Irrigate more frequently during prolonged heat or dry spells.įertilizing: For best flowering, apply a slow-release all-purpose fertilizer according to instructions, or use a water-soluble fertilizer once a month during the growing season. Provide regular water and allow the soil to dry out between waterings. Too much water can result in root rot or mildew. Watering: Verbena does best in moderately moist soil, but can tolerate some drought. Compacted or clay soil can lead to root rot. Soil: Verbena thrives in soil amended with compost, but can adapt to many soil types as long as there is good drainage.
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