Moonrock hydrangea is a beautiful, easy-to-grow shrub that is perfect for any landscape. With its large, round flowers and lush foliage, it adds a touch of elegance to any garden.
About soil condition, the Moonrock Hydrangea grows best in rich, moist, well-drained soil, but it is also tolerant of average conditions. It prefers full sun to partial shade but can also tolerate full shade.
So, like the other hydrangeas, the moonrock hydrangea requires sun to thrive. Without sun, the plant will become leggy and produce fewer flowers. It's best to plant this hydrangea in an area that gets at least six hours of sun each day.
The temperature condition that is best for the moonrock hydrangea is one that is cool and humid. This type of hydrangea does not do well in hot and dry conditions. It is important to make sure that the moonrock hydrangea is in a spot where it will not be in direct sunlight for long periods of time.
Ideal humidity condition for this plant is 50%. The plant should be watered when the soil feels dry to the touch. If the leaves begin to turn brown, it is an indication that the plant is not receiving enough water.
About fertilizer, this kind of plant need high phosphorus fertilizer in early spring. And we need to apply it to the whole root area around the plant. The best way to do this is to dig a hole that is twice the size of the plant's root ball.
Pruning your moonrock hydrangea is important to keep the plant looking its best. You should prune the plant in early spring, before new growth begins. Cut back all of the dead and damaged branches, and then trim back any remaining branches to the desired length.
Propagation : Moonrock hydrangeas can be propagated by rooting stem cuttings. Cuttings should be taken from new growth and should be 4-6 inches long. Cuttings should be taken from the tips of the stems. The bottom leaves should be removed and the stem should be dipped in rooting hormone. The cuttings should be planted in a well-drained potting mix and kept moist.
Usually, the plant growth rate is in the moderate range. However, they can grow quite rapidly in the right conditions. Full sun and moist, well-drained soil will produce the best growth results. This plant is very tolerant of different soils, including clay. It is important to keep the soil moist, especially during hot, dry weather.
Common problems for this kind of plant are powdery mildew, rust, and leaf spot. These problems are all caused by fungi and are easy to spot. Powdery mildew looks like a white powder on the leaves and stems of the plant. Rust is a red or brown powder that appears on the leaves and stems. Leaf spot is a brown or black spot that appears on the leaves.
Source:
Growing Hydrangeas - Center for Agriculture, Food, and the
Hydrangea - University of Connecticut
Take a Look at Hydrangeas - Penn State Extension