Rosemary is an evergreen plant in the family Lamiaceae. It is a herbaceous plant with a long history of cultivation. It has dense foliage and flower pigments. It can be used as a ground cover, hedgerow or potted plant in a well-lit indoor environment. The fragrance emitted by the branches and leaves has the effect of relieving people's nervous depression and enhancing memory.
Rosemary is native to the Mediterranean region and enjoys a sunny and warm and dry environment. It is resistant to cold, thin and dry, and is resistant to stagnant water. It is suitable for growing in well-drained sandy soils that contain lime. Here are some notes on the cultivation of rosemary:
Reproduction
Suitable for rosemary breeding methods include sowing, cuttings, layering and so on. Rosemary seeds germinate slowly and have a low germination rate. They are usually used only when new varieties are introduced. In the case of large-scale planting of conventional varieties, asexual reproduction is used. In small-scale production, good plants as long as 30 cm to 40 cm can be directly used as mother plants, and a large number of lateral branches can be germinated by the pinching mother to collect the cuttings, and the young shoots of 3 cm to 5 cm on the mother plant and 7 can be obtained. Cinto to 10 cm long un-lignified shoots can be used as cuttings.
After the cuttings are cut, the base leaves are cut off and placed in a container filled with fresh water. When large-scale production is carried out, it usually takes a lot of effort to obtain cuttings by themselves. The economical method is to purchase rootless cuttings directly from high-quality seedlings.
The cutting matrix can be perlite, peat soil, loess, crude river sand, etc., and a mixed matrix can also be used. To accelerate rooting, rooting accelerants such as indole acetic acid or naphthalene acetic acid may be used.
During the rooting period, the suitable temperature in the greenhouse is 22°C, and it is necessary to constantly spray the cuttings, but too humid will cause the top of the cuttings to rot, and the roots produced are not robust enough. In the first 10 to 14 days, the cuttings begin to take root, and special care must be taken to prevent the cuttings from wilting.
Transplanting
After the cuttings were rooted, they were transplanted. Usually transplanted into pots with a diameter of 10 cm, depending on the species and season, planted in 10 cm pots for 6 to 10 weeks. During the period, pruning should be done in time to better grow the lateral branches, and do not exceed half the length of the branches each time you trim.
The fertilizer used for rosemary is generally 14-4-14, preferably 125 ppm. During this period, the pH of the substrate was maintained at 5.8 to 6.2. If there is a concern about pH changes, in the winter, nitrate nitrogen can be used in place of ammonium nitrogen. In general, the use of chelated iron can help maintain the proper pH of the matrix.
Watering is the most critical technique in the planting of rosemary. The basic principle is: If you are not sure that you should not be pouring today, then pour it tomorrow. That is, rosemary is not afraid of wetness.
Pest Management
In humid environments, root rot and gray mold are common diseases of rosemary. If the cultivation substrate is still wet, the rosemary plants appear wilting and the plants need to be immediately removed from the greenhouse. The most common pests are red leafhoppers and whiteflies. Currently, the most ideal method is the use of biological control. No matter what kind of pests and diseases are concerned with prevention, they can start with hygienic conditions, proper water management, reasonable temperature and light, and they must constantly observe and dispose of sick and weak strains.
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