Rosemary Planting Methods
This article provides an overview: Introduction to rosemary and other flowers, rosemary planting methods, and related content as follows:
Rosemary prefers a warm climate, but grows slowly during the high-temperature periods on flat lands (T-W). It is more suitable for growth in winter without cold currents. As rosemary leaves are leathery, it can tolerate drought. Therefore, planting in sandy-rich soil that allows good drainage is beneficial for its growth. It is worth noting that rosemary grows slowly, which means it has a weak regenerative ability. Special care must be taken when pruning and harvesting. In particular, the speed of lignification in old branches is rapid, and excessive strong pruning can often lead to the plant being unable to sprout again. A safer approach is to not cut more than half the length of the branches during each pruning.
Although each rosemary plant has small buds in the axils of leaves, these buds will develop into branches as the branches extend. When the plant grows larger, with branches spreading horizontally, it not only looks disorderly but also becomes an easy target for pests and diseases due to poor ventilation. Therefore, regular pruning is very important. Upright varieties can grow very tall in the field. To facilitate management and increase yield, the top should be cut after planting and then pruned 2-3 times after the lateral buds sprout, making the plant shorter and tidier.
Propagation and Cultivation
When propagating rosemary from seeds, germination is slow and the germination rate is low. According to the literature, if the germination temperature is between 20°C to 24°C, the germination rate is less than 30%, and the germination time can take up to 3-4 weeks. However, if the seeds are germinated at 20°C to 24°C for a week and then treated at 4.4°C (40°F) for 4 weeks, the germination rate can increase to 70%. Therefore, unless new varieties are introduced from abroad, propagation by cuttings is a quick and reliable method. Simply purchase a few pots as mother plants, fill a 50-cell tray with new potting soil, take the top buds for cutting, and dip the base in root-promoting powder to accelerate root growth. Make a small hole with a bamboo stick before inserting the cutting to prevent the root powder from being rubbed off by the potting soil. Place it in a shaded area, and it can be transplanted after about a month. For creeping varieties, you can scar the branches that touch the soil and shallowly bury them. After about a month, cut them from the mother plant to get another rosemary plant, but this method is more troublesome. Sow seeds in March-April or September, but the germination rate is low and the germination time is long. Therefore, propagation by cuttings is commonly used, with the cutting time in March-April or October at a temperature of 16-20°C, and roots can grow in 20-30 days. Layering can also be used in March-April, with planting in May, with a spacing of 30×50 cm, and water thoroughly after transplanting. During the growing season, pay attention to loosening the soil, weeding, and preventing waterlogging. After a few years of planting, the plant's shape may become biased, the lower leaves fall off, and the roots shrink, so it should be renewed by pruning from the rootstock in October-November or February-March.
Preventing Pests and Diseases
1. The plant should be kept ventilated and cool.
2. Sufficient sunlight should be provided (pests and diseases often occur in unventilated and sunlit areas).
3. Avoid high temperature and humid climate and environment.
4. Cut off excessive and old withered branches and leaves, and pick up the withered branches and leaves that fall on the surface of the potting soil to prevent pests and diseases from invading.
The detailed explanation of rosemary planting methods introduced above [] hopes to provide you with help in green plant management!