hoary vervain

Hoary vervain needs to be watered deeply but infrequently. Water the plant when the topsoil feels dry to the touch. Generally, it should be watered every 1-2 weeks during the spring, summer and fall months. In winter, the plant should be only watered once a month or even less. Try to avoid overwatering, as this can contribute to root rot.

Hoary vervain thrives in full sunlight, so it's important to make sure your plant is in a location that gets 6 to 8 hours of direct sunlight every day. During the summer months, direct sunlight should begin early in the morning and end around mid-afternoon. During the winter months, the plant will need direct sunlight from mid-morning until early afternoon. Hoary vervain may also benefit from light shade during the hottest parts of the day. For optimal growth, this plant species should not be in direct sunlight for more than 8 hours a day.

Hoary Vervain should be pruned back in early spring to promote optimal growth and fullness. Pruning should be done lightly, removing only the dieback or dead foliage. Pruning more than necessary will reduce bloom yield, so it should only be pruned when absolutely necessary. To maintain its height, prune the entire plant back to the same height each year.