Vitex trifolia purpurea - Purple Arabian Lilac

Growth habit: This plant grows as a medium-sized bush, about 5 to 10 feet tall. It is easy to manage, fits well in most garden spaces, and can also be grown in a large container or shaped through pruning to suit smaller areas.

Growing conditions: This plant can be grown outdoors in suitable USDA zones. It is well-suited for small backyards, pots, or indoor spaces with enough light.

Watering: This plant needs moderate watering. Allow the top of the soil to dry slightly before watering again.

Sun exposure: This plant grows best in full sun or very bright light. If grown indoors, it should be placed in a bright spot, such as near a south-facing window or under strong grow lights.

USDA Zone: USDA 9-11. The USDA Plant Hardiness Zone Map categorizes North America into zones based on average annual minimum winter temperatures, each differing by 10 °F. This map serves as a basic guide for selecting appropriate plants for a region. However, it's not definitive; plant varieties vary in cold tolerance, and young plants typically need more protection. Additionally, local microclimates, like sheltered areas or sunny spots, can influence plant health and survivability beyond the general zone recommendation.

Hardiness: Protect from freezing. Plant hardiness indicates the coldest temperature a mature plant can endure briefly while staying healthy. This rating is a guideline and can vary among varieties of the same species. Young plants often need more cold protection. Additionally, a plant's survival can be enhanced by the microclimate of its location, which may provide shelter from wind or extra warmth, allowing it to thrive beyond its typical hardiness range.

Flower color: This plant produces blue, lavender, or purple flowers during its blooming season.

Foliage: This plant is grown for its ornamental foliage, which adds texture or color to the landscape even when not in bloom.

Plant in well-draining soil and choose a location that matches the plant's light and space needs. Improve poor soils by mixing in compost or organic matter. Dig a hole twice as wide and no deeper than the root ball - planting too deep can harm the plant. For better drainage, position the plant so the top of the root ball is slightly above ground level. Water thoroughly after planting. Outdoor plants may need temporary shade during the first few weeks to protect them from strong sun or heat. Watch the soil moisture closely and water regularly until the plant is well established. Apply mulch around the base to help retain moisture and reduce weeds, forming a shallow basin to hold water. Keep mulch a few inches away from the trunk or stem to prevent rot.

Use a container with drainage holes and a well-draining potting mix. Position the plant so that the top of the root ball is level with the surface of the soil - avoid planting too deep. A slow-release fertilizer can be mixed into the soil at planting time to support healthy growth. Place the plant in a location that matches its light needs, and water according to its care requirements. Be careful not to overwater, and ensure good airflow around the plant to reduce the risk of pests and disease.

When it gets cold, some plants need extra help. You can move potted plants indoors or under a covered patio. Young plants need extra protection because they are more sensitive to cold and less established. For plants in the ground, use frost cloth to keep them warm. Stop using fertilizer in late fall so plants can rest. Try to place plants in areas protected from cold wind, rain, and frost.

USDA zone and hardiness are only general guidelines. Actual cold tolerance can vary based on plant variety and local conditions. Even small differences between varieties can matter. Also, warmer spots in your yard—like near a wall or fence—can help plants survive cold nights. These little warm areas are called microclimates, and they make a big difference.