Climbing hydrangea is a flowering perennial vine that can grow up to 80 feet in length given the proper growing conditions. The plant is native to sub-tropical regions of Asia, but it can be easily grown in most temperate regions around the world. Climbing hydrangea plants produce large, fragrant white flowers during late spring and early summer. Although they are slow to become established, climbing hydrangeas require only minimal care to thrive under most conditions.
Plant climbing hydrangea in early spring in a location that receives full, direct sunlight throughout the day. Spread 2 inches of organic compost over the planting site and use a garden tiller to incorporate it into the soil to increase drainage and fertility. Space plants 15 to 20 feet apart.
Use twine to secure climbing hydrangea to a support structure such as a trellis or tall fence. Tie the twine loosely enough to allow climbing hydrangea room to grow, but ensure it is tight enough to keep the plant from slipping off.
Spread a 3-inch layer of mulch over the soil surrounding climbing hydrangea plants. Start the band at least 3 inches from the base of the plant to allow air circulation and room for growth. Replenish the mulch as needed to keep it 3 inches thick at all times.
Water climbing hydrangea once every two weeks during spring and fall by pouring two 1-gallon buckets full of water over the roots surrounding the plant. Increase the frequency of watering to once every week during summer. Do not water during winter.
Feed climbing hydrangea twice per year, once in spring and once in fall, using a slow-release fertilizer. Water thoroughly before and after applying the fertilizer. Follow the instructions provided by the manufacturer for proper dosage.
Remove any dead or fading flowers as soon as possible to encourage climbing hydrangea plants to produce more blossoms instead of seeds. Pinch the flowers off as close to the stem as possible to minimize damage.