The Ultimate Guide to Growing Merritt's Supreme Hydrangea

Merritt's Supreme Hydrangea

Are you looking for a stunning flowering plant that can add a touch of elegance to your garden? Look no further than Merritt's Supreme Hydrangea. This beautiful shrub produces large, rounded clusters of pink or blue flowers that bloom from summer until fall. In this guide, we will cover everything you need to know about growing and caring for Merritt's Supreme Hydrangea.

Choosing the Right Location

Merritt's Supreme Hydrangea requires a location that provides full sun in the morning and partial shade in the afternoon. The soil should be moist and well-drained, but not waterlogged. If your soil is heavy clay, add plenty of organic matter like compost or peat moss to improve drainage.

Soil pH

It's important to note that the color of the flowers depends on the soil pH. If your soil is acidic (pH below 7), the flowers will be blue. On the other hand, if your soil is alkaline (pH above 7), the flowers will be pink. You can adjust the soil pH by adding lime to raise the pH or sulfur to lower it.

Planting Merritt's Supreme Hydrangea

The best time to plant Merritt's Supreme Hydrangea is in the spring when the soil has warmed up. Dig a hole that is twice as wide and as deep as the root ball. Place the plant in the hole, making sure that the top of the root ball is level with the soil surface. Fill in the hole with soil and tamp down gently. Water the plant thoroughly.

Spacing

When planting more than one Merritt's Supreme Hydrangea, space them at least 5 feet apart to give them room to grow.

Caring for Merritt's Supreme Hydrangea

Watering

Merritt's Supreme Hydrangea needs regular watering, especially during hot and dry periods. Make sure the soil is moist but not waterlogged. A layer of mulch around the base of the plant can help retain moisture.

Fertilizing

Fertilize Merritt's Supreme Hydrangea in early spring with a slow-release fertilizer that is high in phosphorus. This will promote healthy root growth and flower development. Avoid fertilizers that are high in nitrogen, as they can encourage leafy growth at the expense of flowers.

Pruning

Merritt's Supreme Hydrangea does not require much pruning, but you can remove any dead or damaged wood in late winter or early spring. If you want to control the size of the plant, you can prune it back by up to one-third after it has finished flowering.

Common Diseases and Pests

Powdery Mildew

Powdery mildew is a common fungal disease that affects many plants, including Merritt's Supreme Hydrangea. It appears as a white powdery coating on the leaves and stems. To prevent powdery mildew, make sure your plants have good air circulation and avoid overhead watering. If your plants do get infected, you can treat them with a fungicide.

Spider Mites

Spider mites are tiny pests that suck the sap from the leaves of Merritt's Supreme Hydrangea, causing them to turn yellow and dry up. To prevent spider mites, keep your plants well-watered and avoid using pesticides that can harm beneficial insects. If you do have an infestation, you can treat it with insecticidal soap.

FAQs

1. How tall does Merritt's Supreme Hydrangea grow?

Merritt's Supreme Hydrangea can grow up to 6 feet tall and wide.

2. Can I grow Merritt's Supreme Hydrangea in a container?

Yes, you can grow Merritt's Supreme Hydrangea in a container as long as the container is large enough to accommodate the plant's root system. Make sure the container has drainage holes and use a high-quality potting mix.

3. How often should I water Merritt's Supreme Hydrangea?

Merritt's Supreme Hydrangea needs regular watering, especially during hot and dry periods. Water deeply once or twice a week, depending on the weather and soil conditions.

4. Can I change the color of the flowers?

Yes, you can change the color of the flowers by adjusting the soil pH. If you want blue flowers, make the soil more acidic by adding sulfur. If you want pink flowers, make the soil more alkaline by adding lime.

5. When should I prune Merritt's Supreme Hydrangea?

You can prune Merritt's Supreme Hydrangea in late winter or early spring before new growth appears. Remove any dead or damaged wood, and if you want to control the size of the plant, you can prune it back by up to one-third after it has finished flowering.