Limelight hydrangea bush is a fast-growing, deciduous shrub that can reach up to 6 feet tall. It has large, round clusters of white or pale green flowers that bloom from mid-summer to fall. The leaves are dark green and turn red or burgundy in the fall.
Related plant:
Elaeagnus Limelight
About soil condition, the limelight hydrangea bush prefers soil that is moist but well-drained. It is also important to make sure that the soil is rich in organic matter. The bush can tolerate a range of soil types, but it will do best in soil that is slightly acidic.
Like the other hydrangeas, the limelight hydrangea bush thrives in full sun to partial shade. It's a heat-tolerant plant, so it's a good choice for gardens in hot, humid summers. The limelight hydrangea bush is a deciduous shrub, so it will lose its leaves in the fall.
The temperature condition that is required for the limelight hydrangea bush is at least 60 degrees Fahrenheit. This means that the bush can withstand being in full sun or partial sun. It is important to make sure that the bush gets enough sun because this is what helps the flowers to bloom. If the bush does not get enough sun, the flowers will not be as vibrant and the bush will not look as full.
Ideal humidity condition for this plant is 50%. If the humidity gets too high, the leaves will start to droop and the stems will start to turn brown. If the humidity gets too low, the leaves will start to curl and the flowers will start to wilt.
Mentioning fertilizer, this kind of plant doesn't need too much. In fact, too much fertilizer will cause the leaves to turn yellow. A good rule of thumb is to fertilize when the plant is first starting to grow in the spring, and then again in mid-summer. For an established plant, you can fertilize once a year in the spring. As for watering, the root system of a limelight hydrangea is very shallow. This means that the plant can dry out quickly, so you will need to water it regularly.
Pruning is an essential part of keeping your limelight hydrangea bush healthy and looking its best. The best time to prune is in early spring, before new growth begins. To prune, simply cut back the stems to the desired length.
Propagation : Hydrangea bushes can be propagated by rooting stem cuttings taken from the tips of new growth in late spring. The cuttings should be about 6 inches long and taken from non-flowering stems. Cuttings can be rooted in moist sand or a mix of perlite and peat moss. Keep the cuttings moist and in a shady location until new growth appears. Once new growth appears, transplant the new plants to individual pots filled with a good quality potting soil.
Usually, the plant growth rate is about 6 to 12 inches per year. However, under ideal growing conditions, some plants may grow up to 24 inches in a year. The best time to plant a limelight hydrangea bush is in early spring or fall.
Common problems for this kind of plant are powdery mildew, rust, and leaf spot. These can all be caused by too much moisture on the leaves of the plant. To prevent these problems, make sure to water the plant at the base and not from above. You should also remove any dead leaves or branches from the plant to improve air circulation.
Source:
Hydrangea Paniculata Limelight | NC State Extension
Growing Hydrangeas - Center for Agriculture, Food, and the
FS1152: Hydrangeas in the Garden (Rutgers NJAES)