The propagation methods of Coleus blumei
In comparison with the general knowledge of most people about the propagation of Coleus blumei, the following are the specific details of the propagation methods for Coleus blumei:
Coleus blumei is usually propagated by sowing to maintain the excellent traits of the variety. For some that cannot maintain varietal traits through sowing, cutting propagation needs to be adopted.
Under the conditions of a high-temperature greenhouse, seeds can be sown in pots throughout the year, usually in March in a greenhouse. Use a well-rotted humus soil mixed with equal parts of plain sandy soil and fill it into the seedling pots. Place the pots filled with fine sandy soil in water to soak through, then sow seeds according to the method for small seeds, cover lightly with soil, and use a glass plate or plastic film to cover, keeping the potting soil moist and watering and caring for it. The suitable germination temperature is 25°C to 30°C, and seeds will germinate in about 10 days. After the seedlings emerge, thin them once or twice, and then transplant them into pots. The young seedlings will have various leaf colors, at which time the best ones can be selected and the poor ones discarded.
Cutting propagation can be carried out throughout the year and is very easy to survive. It can also be combined with pinching and pruning to perform softwood cutting, cutting off the full and robust branches, about 10 cm long, and inserting them into clean and disinfected river sand, making sure the part buried in the soil has leaf nodes for rooting. After cutting, provide shaded care and keep the potting soil moist. At higher temperatures, roots will grow faster, and it is important to avoid overly wet soil to prevent root rot. Roots will form and survive in about 15 days.
Water propagation of Coleus blumei can be done with a half cup of cooled boiled water. Select the middle and upper 2-3 nodes of the robust branches, remove the lower leaves, and place them in the water. When the white water roots grow to 5-10 millimeters, they can be planted in the pot.
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