Camellia japonica 'Greensboro Red', commonly known as Japanese camellia, is a species of evergreen shrub or small tree native to Japan, Korea, and China. It is renowned for its attractive, glossy foliage and stunning, usually large, and showy flowers. Here are some key features and care tips for Camellia japonica 'Greensboro Red':

1. Flowers: Camellia japonica produces large, double flowers with a central cluster of prominent stamens. The 'Greensboro Red' Camellia, as the name states, has double, red blooms.

2. Foliage: The evergreen leaves of Camellia japonica are dark green, glossy, and leathery. The foliage provides an attractive backdrop to the colorful flowers.

3. Size: Japanese camellias vary in size, with some cultivars growing as compact shrubs, while others can reach the size of small trees. The mature height for the 'Greensboro Red' Camellia is 8-10 feet with a slightly more narrow width.

4. Light Requirements: Camellia japonica prefers partial shade to filtered sunlight. Protect them from intense afternoon sun, especially in regions with hot climates. 

5. Soil: These camellias thrive in well-draining, slightly acidic to neutral soil. They prefer soil rich in organic matter. Adding organic mulch around the base of the plant helps retain moisture and maintain a cool root environment.

6. Watering: Camellias need regular watering, especially during dry spells. Keep the soil consistently moist but avoid waterlogged conditions. Mulching helps retain soil moisture.

7. Temperature Tolerance: Japanese camellias are hardy in USDA Zones 7 to 9. They appreciate protection from harsh winter winds and extreme cold temperatures.

8. Pruning: Prune camellias after flowering to shape the plant, remove dead or crowded branches, and encourage bushy growth. Avoid heavy pruning, as excessive cutting may reduce the following year's flower buds.

9. Fertilization: Fertilize camellias with a balanced, acid-forming fertilizer in the spring after flowering. Holly Tone would be the recommended fertilizer to use.

Japanese camellias are valued for their ornamental qualities and are often used in gardens, landscapes, and as specimen plants. With proper care and attention to their specific needs, these plants can provide a burst of color during the cooler months and contribute to a lush, green landscape year-round.