Green hydrangeas is a shrub that bears large, showy flowers. The flowers are usually white, but can be pink, blue, or purple. The plant is native to Japan and Korea, but is now grown in many parts of the world. Hydrangeas are popular as ornamental plants, and many cultivars have been developed.
Related plant:
Euonymus Japonicus Green Spire
Related plant:
Yellow Evergreen Shrub
About soil condition, green hydrangeas need well-drained soil that is rich in organic matter. The ideal pH range for hydrangeas is between 5.5 and 6.5. If your soil is too alkaline, the flowers will be blue. If your soil is too acidic, the flowers will be pink.
Just like other plants, hydrangeas need sunlight to create food for themselves. They will grow in partial sun, but wont produce as many flowers. If you want lots of big, beautiful blooms, give your hydrangeas plenty of sun. Six hours of sun per day is ideal, but they will still do well with four.
The temperature condition that green hydrangeas need is cooler than 60 degrees Fahrenheit. They also need humid conditions and well-drained soil. If the temperature gets too hot, the leaves will wilt and the flowers will droop.
Ideal humidity condition for this plant is between 50% to 80%. If the humidity drops below 50%, the leaves will start to turn brown and curl up. If the humidity goes above 80%, the leaves will start to drop off.
Regarding fertilizer, this type of plant does best with a balanced 10-10-10 fertilizer applied monthly. However, it's important not to over-fertilize, as this can cause the leaves to turn brown. When it comes to watering, green hydrangeas need plenty of water, especially during hot, dry weather. Be sure to check the soil regularly, as it should be moist but not soggy. If the soil is too dry, the plant may wilt.
Pruning green hydrangeas is important to encourage new growth and to keep the plant healthy. To prune, remove any dead or dying stems and leaves, as well as any that are overcrowded. Cut back the remaining stems by about one-third. Be sure to make clean, sharp cuts just above a leaf node.
Propagation is the process of creating new plants from a existing one. There are many ways to propagate green hydrangeas, including taking cuttings, layering, and division. Taking cuttings is one of the most common and easy ways to propagate green hydrangeas. To take a cutting, simply use a sharp knife or pruning shears to cut a 6-8 inch branch from the plant. Be sure to make the cut just below a node, which is where the leaves attach to the stem. Remove the leaves from the bottom half of the cutting, and Dip the cut end in rooting hormone. Place the cutting in a pot filled with moistened potting mix, and keep the soil moist. The cutting should roots within 4-6 weeks. Layering is another easy way to propagate green hydrangeas. Layering is simply when you allow a branch that is touching the ground to take root and create a new plant. To layer a green hydrangea, find a low-hanging branch and bend it down to the ground. Use a sharp knife to make a small cut on the underside of the branch, and then Cover the cut with moistened potting mix. Place a weight on top of the branch to keep it in place, and keep the soil moist. The branch should roots within 4-6 weeks. Division is a great way to propagate green hydrangeas if you already have an established plant. To divide a green hydrangea, simply dig up the entire plant and carefully pull it apart into smaller sections. Each section should have its own root system. Replant the sections in new pots filled with moistened potting mix, and keep the soil moist.
Usually, the plant growth rate is between 6 to 12 inches per year. Some may grow a little faster or slower depending on the variety. The soil, fertilizer, sunlight, and water all play a role in how fast a hydrangea will grow.
Common problems for this kind of plant are that the leaves may turn brown and the flowers may fade. If the leaves turn brown, it is usually due to too much sun or too little water. If the flowers fade, it is usually due to too much sun or too much wind.
Source:
Growing Hydrangeas - Center for Agriculture, Food, and the
HYDRANGEA - HYDRANGEA SPP. | The UFOR Nursery & Lab
Hydrangea arborescens - North Carolina State University