How to Propagate Rosemary? Propagation Methods for Green Plants and Flowers

Rosemary is a common herbaceous plant that gives off a pleasant aroma, enhancing memory and a feeling of freshness. At the same time, rosemary has good industrial value, medicinal value and edible value, thus attracting many friends to grow it. So how do you grow rosemary? The following briefly introduces rosemary's propagation points and cultivation methods. Let's take a look.

I. Rosemary's Propagation Points

1. Sowing: Generally, seedlings are cultivated in a greenhouse in early spring. Seedlings can be raised by the soil method or by seedling cultivation, but the germination rate is very low, generally only 10-20%, and in the first year, rosemary grows extremely slowly; even when it is the size of a plant, in autumn it is not much larger than a newly planted plant, and large-scale production will be slow after 2-3 years. Therefore, production generally adopts asexual propagation. However, when grown from seed, the scent is more fragrant, so the breeding method should be determined according to need.

2. Cuttings: Rosemary cuttings are mostly carried out from winter to early spring. Choose fresh, healthy and not fully woody stems as cuttings. Cut about 10-15 cm from the top and remove about 1/3 of the leaves from the lower part of the branch. Insert directly into the medium, keep the medium moist, rooting will occur within 3-4 weeks, and after 7 weeks they can be planted in the open field, with the lowest nighttime temperature at 13°C.

3. Layering: Rosemary layering mainly uses the characteristic of rosemary stems to produce adventitious roots. Branches near the ground are bent and covered with soil, leaving the top in the air, growing new roots, and being cut from the mother plant into new individuals and planted into the open field.

II. Rosemary's Propagation Methods

1. Site preparation: Before transplanting rosemary, the flat ground should first be dug into ponds according to the plant spacing, a small amount of base fertilizer should be applied, then the base fertilizer should be covered with thin soil, and then transplanting can be done. Generally, the seedlings transplanted in the field are mother plants that have already been transplanted to the roots; the row spacing for transplanted plants is 40×40 cm, and the number of plants per acre is 4000-4300. The planting season is year-round in the central and southern regions of Yunnan Province, with spring and autumn being better.

2. Planting: Rosemary is best planted on cloudy days, rainy days, and during the morning and evening sunlight. After transplanting, root water should be poured. When pouring water, the seedlings should not be knocked over. If there is lodging, it should be stabilized in time. Five days after planting, rosemary is watered for the first time (depending on the dry and wet conditions of the soil). After the seedlings survive, watering can be reduced. Dead seedlings found should be replanted in time. When planting, the ponds should be in straight lines with one another to allow for ventilation.

3. Fertilization: Rosemary is more resistant to ridges. Depending on the soil conditions, a small amount of compound fertilizer is applied after cultivation and weeding. After fertilization, the fertilizer should be covered with soil. After each harvest, quick-acting fertilizer is applied as nitrogen fertilizer and phosphate fertilizer. Mainly, generally 15 kg of urea and 25 kg of calcium phosphate per acre.

4. Pruning: Rosemary can be pruned 3 months after planting. Excessive cutting usually causes the plant to be unable to sprout again. It is safer not to exceed half the length of the branch each time. Although rosemary plants have small buds in each leaf axil, in the future, as the branches elongate, these axillary buds will develop into branches. After growing, the whole plant will not only look messy because of the branches, but will also be affected by poor ventilation and insect pests, so regular pruning is very important.

5. Harvesting: Rosemary can be harvested for many years, mainly by harvesting branches and leaves, which can be done with scissors or by directly folding. However, special attention must be paid to the fact that the sap from the wound quickly turns into glue and is difficult to remove. Therefore, gloves must be worn, and long-sleeved high-imitation clothing should be worn. The amount harvested can be seen from the growing conditions, generally 3-4 times a year, with at least 250-350 kg per acre harvested each time.

[Editor's Translation] Rosemary likes a warm and humid climate and is more drought-tolerant. Therefore, the soil for planting should be rich in sand and have good drainage. It is more conducive to growth and development, and special care is needed during curing. Above, we introduced rosemary's propagation points and cultivation methods, and we hope they are helpful to everyone!