What are the common propagation methods for rose of Sharon?

The propagation methods for rose of Sharon include seed sowing, layering, cuttings and division, but in production, cutting propagation and division propagation are mainly used.

Cutting propagation

Cuttings root quite easily, and some even use long branches, but the planting depth must reach at least 20 cm, otherwise they tend to fall over or, after sprouting, suffer drought damage due to shallow roots; generally, cuttings are taken in spring, and they can bloom in summer and autumn of the same year.

Cutting time and method

After the local temperature has steadily passed 15°C, select robust, non-sprouted 1- to 2-year-old branches (if the rose of Sharon branches have sprouted and grown leaves at the time of cutting, the newly grown leaves should be removed), cut them into small sections 15-20 cm long. When taking cuttings, prepare a small stick, poke small holes in the seedbed according to the plant and row spacing, then insert the rose of Sharon branches, firm the soil, with a planting depth of 10-15 cm, that is, a planting depth reaching 2/3 of the cutting is appropriate, and water thoroughly immediately after insertion. No base fertilizer needs to be applied when taking cuttings. For indoor potted cuttings, select robust 1- to 2-year-old branches about 10 cm long, remove the lower leaves, cut the upper leaves in half, and insert them into a small pot with coarse sand as the substrate, cover with a plastic cover to retain moisture, maintain relatively high humidity, and under conditions of 18-25°C, roots will form in about 20 days.

Cutting density

The density for raising seedlings and transplanting differs from that for direct planting. ① For the seedling-raising and transplanting method, to facilitate operation, make beds 100 cm wide and 25 cm high, and plant at a plant and row spacing of 15× 30 cm; ② For the direct planting method, single-row planting can be done at a plant and row spacing of 50×60 cm, or bed planting can be used, making beds 60 cm wide and 25 cm high, and planting two rows on the bed in a “pin” shape, with a plant spacing of 60 cm. In cultivation, the characteristic that cutting seedlings bloom in the same year can be used, taking cuttings at the seedling-raising and transplanting density, and after the 2nd year, thinning seedlings each year before spring sprouting according to a certain density, ensuring that the rose of Sharon has enough nutritional space for growth that year, so as to increase flower yield.

Division propagation

Before sprouting in early spring, dig up vigorous adult clumps, take 3 main branches as 1 clump, and plant at a plant and row spacing of 50×60 cm.

Rose of Sharon has strong adaptability and can grow in most areas of our country. It likes light and tolerates shade. It is cold-resistant and afraid of drought. This also makes the cultivation method of rose of Sharon simple, and it has strong resistance to smoke and dust. Management is extensive, and appropriate watering is enough. The propagation of rose of Sharon is mainly by cuttings, and whether in spring or autumn, they root extremely easily. Soil can be mounded up to the base of the mother plant to let it send out branches, and then the new branches can be transplanted with soil, with an extremely high survival rate. The cultivation method of rose of Sharon is simple, and management is also quite easy. Apply fertilizer once before spring sprouting, then prune slightly. It is cold-resistant; in winter, it only needs insulation when the temperature is extremely low.
Rose of Sharon symbolizes simplicity and tenacity, just like its life. At the same time, rose of Sharon is also the national flower of South Korea.

Propagation methods for rose of Sharon

The propagation methods for rose of Sharon include seed sowing, layering, cuttings and division, but in production, cutting propagation and division propagation are mainly used.

Cutting propagation

Cuttings root quite easily, and some even use long branches, but the planting depth must reach at least 20 cm, otherwise they tend to fall over or, after sprouting, suffer drought damage due to shallow roots; generally, cuttings are taken in spring, and they can bloom in summer and autumn of the same year.

Cutting time and method

After the local temperature has steadily passed 15°C, select robust, non-sprouted 1- to 2-year-old branches (if the rose of Sharon branches have sprouted and grown leaves at the time of cutting, the newly grown leaves should be removed), cut them into small sections 15-20 cm long. When taking cuttings, prepare a small stick, poke small holes in the seedbed according to the plant and row spacing, then insert the rose of Sharon branches, firm the soil, with a planting depth of 10-15 cm, that is, a planting depth reaching 2/3 of the cutting is appropriate, and water thoroughly immediately after insertion. No base fertilizer needs to be applied when taking cuttings. For indoor potted cuttings, select robust 1- to 2-year-old branches about 10 cm long, remove the lower leaves, cut the upper leaves in half, and insert them into a small pot with coarse sand as the substrate, cover with a plastic cover to retain moisture, maintain relatively high humidity, and under conditions of 18-25°C, roots will form in about 20 days.

Cutting density

The density for raising seedlings and transplanting differs from that for direct planting. ① For the seedling-raising and transplanting method, to facilitate operation, make beds 100 cm wide and 25 cm high, and plant at a plant and row spacing of 15× 30 cm; ② For the direct planting method, single-row planting can be done at a plant and row spacing of 50×60 cm, or bed planting can be used, making beds 60 cm wide and 25 cm high, and planting two rows on the bed in a “pin” shape, with a plant spacing of 60 cm. In cultivation, the characteristic that cutting seedlings bloom in the same year can be used, taking cuttings at the seedling-raising and transplanting density, and after the 2nd year, thinning seedlings each year before spring sprouting according to a certain density, ensuring that the rose of Sharon has enough nutritional space for growth that year, so as to increase flower yield.

Division propagation

Before sprouting in early spring, dig up vigorous adult clumps, take 3 main branches as 1 clump, and plant at a plant and row spacing of 50×60 cm.