Allamanda cathartica

1. **Botanical Description**:

   - **Leaves**: Allamanda cathartica has opposite, elliptical to ovate, deep green leaves that are about 6 inches (15 cm) long. The leaves are smooth and glossy.

   - **Flowers**: The most distinctive feature of this plant is its large, bright yellow, funnel-shaped flowers. Each flower can be up to 3-4 inches (7.5-10 cm) in diameter and has five petals. They appear in clusters and create a stunning display when in full bloom.

   - **Growth Habit**: Allamanda cathartica is a woody shrub or climbing vine, depending on how it is grown and supported. In its natural habitat, it can reach heights of up to 20 feet (6 meters) or more.

2. **Cultivation**:

   - **Hardiness Zone**: Allamanda cathartica is typically grown in tropical or subtropical regions and is not frost-tolerant. It is best suited for USDA hardiness zones 10-11.

   - **Sunlight**: This plant thrives in full sun, so it should be placed in an area where it receives at least 6-8 hours of direct sunlight per day.

   - **Soil**: Well-draining soil is essential for the health of Allamanda cathartica. It prefers slightly acidic to neutral soil with good drainage.

   - **Watering**: It requires regular watering to keep the soil consistently moist but not waterlogged. Allow the top inch of soil to dry out between waterings.

   - **Fertilization**: Feed with a balanced, water-soluble fertilizer during the growing season (spring and summer) to encourage blooming.

   - **Pruning**: Pruning can help maintain a tidy shape and encourage more flowering. Trim back leggy growth and spent flowers as needed.

3. **Toxicity**:

                All parts of the Allamanda cathartica plant are considered toxic if ingested, and contact with the milky sap may cause skin irritation. Keep it out of the reach of pets and children.

4. **Pests and Diseases**: 

               Common pests that may affect Allamanda cathartica include aphids, mealybugs, and spider mites. Proper care and regular inspection can help prevent infestations. It is also susceptible to fungal diseases in overly moist conditions.

5. **Landscaping Use**: 

              Golden Trumpet is often used as an ornamental plant in tropical gardens, both as a standalone specimen and as a climber on trellises, fences, or pergolas. Its vibrant yellow flowers and lush green foliage make it an attractive choice for adding color and visual interest to landscapes.

6. **Medicinal Uses**:

             Some traditional medicine systems have used parts of Allamanda cathartica for their purported medicinal properties, although the plant's toxicity makes it a less common choice for medicinal purposes today. It has been used for its purgative and emetic effects.

Remember that due to its toxicity, Allamanda cathartica should be handled with care, and precautions should be taken to keep it away from children and pets. If you choose to cultivate it, enjoy its beauty responsibly.