A Detailed Guide to the Latest Propagation Methods for Hyacinths

Hyacinths are usually propagated mainly by dividing offsets, while seed propagation is used in breeding; they can also be propagated from bulbs. After a mother bulb is planted for 1 year, it produces 1 to 2 offsets, and some varieties can produce more than ten offsets. These can be used for offset division propagation, and offsets take 3 years to flower. With seed propagation, sowing is done in autumn, germination occurs only in February of the following year, and seedlings take 4 to 5 years to flower. Let us take a look at the propagation methods of hyacinths together below!

Growth Habits of Hyacinths

Hyacinths like sunlight and tolerate cold, and are suited to cool, moist environments and loose, fertile sandy soil; they dislike waterlogging. They prefer warm, moist winters and cool, slightly dry summers, in a sunny or semi-shaded environment. They like fertilizer and are best in fertile, well-drained sandy loam. They can be grown in the ground, in pots, or in water.

Hyacinths root in autumn, their new shoots emerge from the soil in early spring, they flower in March, their fruit ripens in late May, and in early June the aboveground parts wither and the plants enter dormancy. Flower bud differentiation takes place during dormancy, with an optimum temperature of about 25°C, and the differentiation process takes about 1 month. After flower bud differentiation and before elongation growth, there must be a low-temperature stage of about two months, and the temperature must not exceed 13°C.

During the growth process of hyacinths, the root system of the bulb grows best at low temperatures of 2-6°C. The optimum temperature for bud break is 5-10°C, the optimum temperature for leaf growth is 5-12°C, and 15-18°C is most favorable during the bud appearance and flowering stage. The storage temperature for bulbs is 20-28°C, with 25°C being the most suitable and ideal for flower bud differentiation. They can tolerate short periods of frost. They like cool, humid air and a sunny environment, and are relatively cold-tolerant.

Offset Division Propagation of Hyacinths

After the bulbs are dug up in June, separate the large bulbs from the offsets. “Large bulbs can flower in early spring of the following year after autumn planting, while offsets need 3 years of cultivation before they can flower. Because the natural offset production rate of hyacinths is low, a mother plant generally produces only 1 to 2 offsets after one year of planting. To increase the propagation coefficient, large bulbs can be subjected to scoring during the summer dormant period to stimulate them to produce offsets.

The method is as follows: in August, when the flower buds have already formed, first evenly scoop out part of the basal plate at the bottom of the bulb so that the wound at the basal plate forms a concave shape, then cut downward from bottom to top with one vertical and one horizontal cut, forming a cross-shaped incision, reaching as deep as the bud core inside the bulb. At this time, sticky fluid will flow out, which should be disinfected by smearing with 0.1% mercuric chloride solution. Then expose it to the hot sun for 1 to 2 hours, and then spread it flat indoors. First keep the room temperature at about 21°C to allow callus tissue to form. When the base of the scales swells, gradually raise the temperature to 30°C with a relative humidity of 85%. In about three months, many small bulbs will form. The small bulbs induced in this way take 3 to 4 years to flower.

Seed Propagation of Hyacinths

Seed propagation of hyacinths is mostly used when breeding new varieties. The seeds are sown in autumn into the growing medium in a cold frame, covered with 1 cm of soil, and germinate in late January to early February of the following year. The small bulbs grown from seedlings flower after 4 to 5 years, and under ordinary storage conditions the seeds can retain their germination capacity for 3 years.