While the verbena flower is drought resistant, the blooms are improved with regular watering of an inch or so each week. Water verbena plants at the base to avoid wetting the foliage. However, verbena plant care may not include weekly water if rainfall in your area has reached an inch or more. A limited application of complete, slow-release fertilizer is also a part of verbena plant care. Apply in spring and again following the occasional trims needed for optimum bloom.

When planted in proper verbena growing conditions, expect blooms the first season. Continued blooms throughout the summer are possible if the gardener keeps the plant trimmed back. Some are hesitant to remove parts of the plant regularly, but this is often necessary when planting verbena for summer blooms. When blooms slow, trim the entire plant back by one fourth for a new show of flowers in two to three weeks. Fertilize lightly following the trim and water well. Repeat this step as needed when learning how to grow verbena successfully. When planting verbena, remember to water, fertilize and trim for long lasting color in the summer garden and beyond.