Cultivation Method: Rosemary prefers warm climates, but it grows slowly during high-temperature periods in Taiwan's plains. Temperatures without cold snaps in winter are more suitable for its growth. In terms of water supply, rosemary leaves themselves are leathery. It is more tolerant to drought, so the soil for planting should be rich in sand and well-drained, which is more conducive to growth and development. It is worth noting that rosemary grows slowly, which also means that its regeneration ability is not strong, so it must be pruned and harvested. Be especially careful, especially as old branches lignify quickly. Excessive pruning at once often results in the plant being unable to germinate. A safer approach is not to cut more than half of the branch length each time. Observe the rosemary plant. Although there are small buds appearing in each leaf axil, as the branches elongate in the future, these axillary buds will also develop into branches. When they grow up, the entire plant will not only look messy due to the horizontal branches, but also be prone to poor ventilation. It becomes a habitat for pests and is susceptible to disease, so regular pruning is important. Upright varieties can easily grow very tall when planted in the field. In order to facilitate management and increase harvest, the tops should be cut off when they start to grow after planting, and then cut off 2 to 3 times after the side buds sprout, so that the plants will be lower. Short and neat. When rosemary is propagated by seeds, it germinates slowly and has a poor germination rate. According to literature, if the germination temperature is between 20°C and 24°C, the germination rate is less than 30%, and the germination time is as long as 3 to 4 weeks. However, if it is first After germination at 20℃ to 24℃ for 1 week and then treated at 4.4℃ (40℉) for 4 weeks, the germination rate can be increased to 70%. Therefore, unless new varieties are introduced from abroad, propagation by cuttings is a fast and guaranteed method. You only need to buy a few pots to use as female parents, fill a 50-cell plug tray with new culture soil, and take cuttings from the top buds. If you want To speed up the rooting process, you can dip some rooting powder at the base before cutting. Use bamboo chopsticks to insert a small hole before cutting to prevent the rooting powder from being wiped off by the culture soil. Place it in a cool place for about a month before transplanting. For creeping species, you can use the lying branches to carve the area in contact with the soil and then bury it shallowly. After about a month, cut off the mother plant and it will be another rosemary tree, but the operation procedure is more troublesome. Propagation and cultivation: Sow seeds from March to April or September, but the germination rate is low and the germination time is long. Therefore, cuttings are often used for propagation. The cutting time is from March to April or October at 16-20°C. Roots can take place in 20-30 days. It can also be propagated by layering from March to April and transplanted in May. The spacing between rows is 30×. 50 cm, water thoroughly after transplanting. During the growing season, pay attention to soil loosening, weeding, drainage and waterlogging prevention. After rosemary is planted for several years, the plant shape will become skewed, the lower leaves will fall off, and the roots will shrink, so it should be renewed and pruned from the roots in October-November or February-March. Growth habits: It likes cool summers, severe cold winters, and habitats with large temperature differences between day and night. It likes warmth. The optimal temperature for growth is 9-30°C. It is drought-resistant and avoids high temperatures and high humidity. It often grows poorly during the rainy season. It likes sufficient sunshine and good ventilation conditions, and has a wide adaptability to soil pH values. It can grow in soil with a pH of 4.5-8.7.