What are the propagation methods for Hydrangea (hydrangea)?

  Hydrangea is a common flowering plant, also known as eight immortals flower, ziyang flower, foreign hydrangea, etc. It is native to the Sichuan area of China and Japan, and is a deciduous shrub of the Saxifragaceae family, Hydrangea genus (scientific name: Hydrangea). Its flowers are almost entirely sterile flowers; the so-called “flowers” are merely sepals. The flower colors include white, blue, pink, purplish red, peach red, etc. Its umbel-like inflorescences are piled up like snowballs, clustered among the oval green leaves, very attractive. It is a very important summer flowering shrub and can be planted almost anywhere, so what are the propagation methods for hydrangea?

  Hydrangea can be propagated by division, layering and cuttings, and cuttings are generally used most often.

  Cuttage propagation:

  For cuttings in early spring, one-year-old branches that have not yet sprouted can be used as cuttings; for cuttings from May to August, new shoots of the current year can be used as cuttings. The cuttings are about 10 cm long and have 2 to 3 nodes. The rooting medium is plain sand or vermiculite. After cutting in early spring, shade and keep warm, and maintain a certain humidity; after cutting from May to August, shade and keep moist, place in a shaded place, spray water frequently, and keep the medium moist. After about 30 days, they can take root and survive, and after rooting they can be divided and potted.

  During the plum rain period, select robust young branches from young mother trees as cuttings. The base of the cutting must have a node and be dipped in mud slurry. The length is about 20 cm, and the lower leaves are removed. The suitable temperature for cutting is 13 to 18°C. After cutting, shade is needed, and it should be kept moist frequently. Roots develop in about 15 days to 1 month, and after survival they can be transplanted in the second year.

  Layering propagation:

  Layering propagation uses two-year-old branches and is carried out before budding in early spring. When layering, wound the part buried in the soil, otherwise it is not easy to root. Bury 2 to 3 cm deep, cover with 1 cm of soil, press firmly, water thoroughly, cover with plastic film, and roots will form after 30 days. When the exposed part of the layer sends out new branches with 3 to 4 nodes, some fertilized water can be applied to promote growth. In the following spring, separate it from the mother plant, transplant it with a soil ball, and it can bloom that same year.

  Division propagation:

  Division propagation is best carried out before budding in early spring. When dividing, take the plant out of the pot, separate several plants from the roots, and replant them separately. Division propagation should be carried out before budding in early spring. Separate the rooted branches from the mother plant, pot them directly, do not water too much, and maintain them in semi-shade; after new buds sprout, return to normal care.

  Grafting propagation

  Grafting propagation uses seedlings of Viburnum macrocephalum as rootstock, and cut grafting in spring makes it easy to survive. Transplanting is best done after leaf fall or before budding, and the original soil should be kept. The main branches easily send out vigorous water shoots, so after flowering they need proper pruning to shape the tree form.