Contents
Description
Hydrangea Macrophylla Merritt S Supreme is a deciduous shrub that belongs to the family Hydrangeaceae. It is a hybrid of the mophead hydrangea and was first introduced in the 1970s. This shrub is known for its large and showy flowers that bloom in mid to late summer. The flowers are pink to blue and can grow up to 8 inches in diameter. Hydrangea Macrophylla Merritt S Supreme is a popular choice for gardens and landscaping due to its beautiful flowers and easy care.
Taxonomic Information
| Domain | Eukaryota |
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Cornales |
| Family | Hydrangeaceae |
| Genus | Hydrangea |
Appearance
Hydrangea Macrophylla Merritt S Supreme can grow up to 6 feet tall and wide. Its leaves are dark green and glossy, with a serrated edge. The flowers are large and round, with a diameter of up to 8 inches. The color of the flowers can vary from pink to blue, depending on the soil pH. In acidic soil, the flowers will be blue, while in alkaline soil, they will be pink. The plant blooms in mid to late summer and the flowers can last for several weeks.
Care Guide
To care for Hydrangea Macrophylla Merritt S Supreme, you should:- Water: This shrub needs regular watering, especially during dry spells. Keep the soil moist but not waterlogged.- Fertilization: Fertilize in the spring with a balanced fertilizer. Avoid fertilizing in the fall, as this can encourage new growth that may not harden off before winter.- Soil: This shrub prefers well-draining soil that is rich in organic matter. It can tolerate slightly acidic to slightly alkaline soil.- Sunlight: This shrub prefers partial shade to full sun. In hot climates, it benefits from afternoon shade.- Hardiness zones: Hydrangea Macrophylla Merritt S Supreme is hardy in zones 5-9.
Common Pests & Diseases
Hydrangea Macrophylla Merritt S Supreme is generally resistant to pests and diseases. However, it can be susceptible to:- Powdery mildew: This fungal disease appears as a white powdery coating on the leaves. It can be treated with a fungicide.- Aphids: These small insects can suck the sap from the leaves and stems. They can be treated with insecticidal soap.- Spider mites: These tiny pests can cause yellowing and discoloration of the leaves. They can be treated with insecticidal soap.
Habitat
Hydrangea Macrophylla Merritt S Supreme is native to Asia and grows in moist, shady areas such as woodland edges and stream banks. It is widely cultivated as an ornamental plant in gardens and landscaping.
Question and Answer
Q: How often should I water my Hydrangea Macrophylla Merritt S Supreme?
A: This shrub needs regular watering, especially during dry spells. Keep the soil moist but not waterlogged.
Q: What is the pH of the soil needed to get blue flowers?
A: In acidic soil, the flowers will be blue.
Q: What is the best time to fertilize this shrub?
A: Fertilize in the spring with a balanced fertilizer. Avoid fertilizing in the fall, as this can encourage new growth that may not harden off before winter.
Q: What are the common pests and diseases that can affect Hydrangea Macrophylla Merritt S Supreme?
A: This shrub can be susceptible to powdery mildew, aphids, and spider mites.
Related Plants
– Hydrangea Arborescens- Hydrangea Paniculata- Hydrangea Quercifolia- Hydrangea Serrata
References
– Missouri Botanical Garden: Hydrangea Macrophylla ‘Merritt’s Supreme’- The Spruce: How to Grow and Care for Hydrangea Macrophylla- Royal Horticultural Society: Hydrangea Macrophylla ‘Merritt’s Supreme’
