Clivia Seed Planting Methods, Leaf Spot Prevention and Treatment, and Development Prospects

Clivia, also known as sword-leaf clivia and large-leaf clivia, is an ornamental flower of the genus Clivia in the Amaryllidaceae family. Clivia has high ornamental value, and in China it is often grown in pots in greenhouses for viewing. It is propagated by division or by seed. Do you know what the methods for planting clivia seeds are? What should you do if the leaves develop spots? What are the prospects for its cultivation and development? The nodding clivia (Clivia nobilis) has the same effects as clivia; it is cultivated in greenhouses in various places and has flowers of many colors. The lifespan of clivia reaches several decades or longer. Clivia is the city flower of Changchun.

I. Clivia Seed Planting Methods

1. Seed selection: After the fruit ripens, cut the entire fruit stalk from the lowest part of the stalk and dry it in a shaded, ventilated place for about 15 days. Remove the seeds, select plump ones with a visible eye (germ pore), wrap them in gauze, and leave them in a shaded, ventilated place for 3 days before soaking and sowing.

2. Seed soaking and sowing: Remove the seeds, select plump ones with a visible eye (germ pore), wrap them in gauze, and leave them in a shaded, ventilated place for 3 days before soaking and sowing.

After the seeds are removed from the fruit ball, wrap them in gauze and leave them for 3 days, then soak them in a glass jar at about 25 degrees for 1-5 days until they sprout (on the first day the water fully covers the seeds; from the second day on, keep only about 1 mm of water, and cover the jar opening with transparent plastic wrap to retain moisture), then place them in a breathable plastic basket filled with a 10 cm thick layer of freshly sterilized sawdust (cover the seeds with 1 cm of sawdust) for germination, keeping the temperature at 20-27 degrees (about 25 degrees), and spray a suitable amount of water once a day to maintain humidity.

3. Sowing methods: There are many different ways to sow clivia, but among the methods that use easily found materials, are not technically difficult, and give a high seedling emergence rate, none surpass the two methods of sowing in river sand and sowing in sawdust.

Sowing in river sand: take relatively fine river sand, rinse it with clean water and scald it with boiling water to sterilize it, place it in a container and level it off, arrange the seeds on the sand surface at a spacing of about 2 cm with the germ pore facing down, and cover with a thin layer of sand.

Sowing in sawdust: take sawdust from mixed wood of medium coarseness, sterilize it by frying in a pan or steaming, place it in a container to a thickness of 7 cm to 10 cm. With the germ pore facing down and the same spacing as above, cover the seeds with sawdust, water thoroughly, and stretch film over the container opening or cover it with glass.

4. Germination: After 30 days of germination, the seeds have all grown long young roots and leaf sheaths. Plant them densely in a flower pot at a spacing of 1 cm with the leaf sheaths exposed and facing the same direction, keep the temperature at 20-27 degrees (about 25 degrees), provide appropriate light, and spray water regularly according to the humidity.

II. What to Do If Clivia Leaves Develop Spots

1. Causes of spots

Improper fertilization

Applying fertilizer that has not been fully fermented causes pathogens to multiply in large numbers in the potting soil.

Improper soil changing

If the potting soil is not changed for a long time, the nutrients in it decrease and disease-causing bacteria are present. If the plant has wounds, it is very easy for bacteria to infect it and cause disease. In addition, if the new soil used for replacement is improper, it may contain pathogens, or the soil may be too raw.

Imbalance of nitrogen, phosphorus and potassium in fertilizer

This is especially the case when potassium fertilizer is insufficient or when fertilizer directly touches the roots during application. Rust spots on individual leaves are often caused by fertilizer directly touching a certain fleshy root or coming into contact with a wound.

2. Solutions

Do a good job of prevention

First, prevent the plant from developing root rot so that the leaves can get sufficient nutrients; second, eliminate external injuries and prevent wounds from spreading; the amount of fertilizer applied must be well controlled, and by all means avoid excessive fertilizer. In summer, do not water mature large flowering plants at the pseudobulb. In summer, pay attention to ventilation, lower the temperature, strengthen management, and regularly spray sterilizing agents such as carbendazim, chlorothalonil, thiophanate-methyl and agricultural streptomycin for prevention and control; this can reduce or eliminate the occurrence of leaf spot disease and leaf yellowing disease.

Replace with new soil

To prevent and treat leaf spot disease, the method of changing the soil can solve the problem. When changing the soil, wash the fleshy roots clean with clean water and let them dry before repotting. If some leaves have already rotted beyond recognition, simply cut them off.

Spray chemicals

Tuzet is an organic sulfur-arsenic compound fungicide that can prevent and treat many fungal diseases, such as white rot, brown spot and stem spot. Use a 500-1000 times dilution, spraying once every half month; 3-4 consecutive sprayings will achieve results. Tuzet is toxic, so pay attention to safety when using it.

III. Analysis of the Development Prospects of Clivia Cultivation

In recent years, the clivia flower industry has developed rapidly. It has developed not only in northern cities such as Changchun, Anshan, Shenyang and Harbin, but has also been widely cultivated in North China, Northwest China and various places in the south. The speed of the clivia industry's development has exceeded people's expectations and imagination. However, most existing production bases are household-scale, and there are very few truly professional production bases, which brings many difficulties to the large-scale production, sales and export of clivia. This contradiction between small-scale production and the demand of a large market can only be resolved through industrialization. In Belgium, where clivia industrialization is relatively advanced, modern greenhouses are used, with factory-style management, conveyor belts for transport, specialized equipment for changing soil, computer-controlled watering and fertilization, and soilless cultivation substrates as the growing medium; all the clivia produced is supplied to European countries. In China, developing the industrialization of clivia must suit China's national conditions. First, it must rely on government support; second, it must reach a relatively large production area and have production bases with famous-brand products; third, it must have a research and development center for new varieties; fourth, it must have a professional marketing network and after-sales service system; fifth, it must develop new application areas for clivia, such as research on cut flowers and development of medicinal value. Only in this way can clivia production move toward specialization and large-scale operation, ultimately connecting with the international flower market and realizing the industrialization of clivia. In short, only by combining the variety advantages and cultivation-level advantages of Chinese clivia with industrialized production can Chinese clivia always remain in a leading position in the world.