How to Propagate the Succulent Rebutia (Crown Cactus)? Detailed Guide to Key Growing Points

Rebutia is a short, flattened-spherical cactus, a type of succulent. It gets its name because its body base readily produces offsets, often forming large clumping colonies. Below is an introduction to the main growing key points for the succulent Rebutia, for everyone's reference.

1. Growth Habits of Rebutia

Rebutia produces many flowers, which emerge from the middle and lower part of the stem, funnel-shaped and bright red.

Rebutia is robust and highly adaptable. It likes ventilated, sunny environments, is not tolerant of direct strong light, and requires well-drained calcareous soil.

The orange-red Rebutia is native to Bolivia and likes warm, dry, sunny environments. It is not cold-tolerant, dislikes waterlogging, and tolerates drought and partial shade. The optimal growing temperature is 20 to 25 degrees, and it requires ample sunlight during the growing season.

2. Propagation Methods for Rebutia

Rebutia is relatively easy to propagate by sowing, division, or cuttings.

1. Sowing

The body blooms from the base in spring and summer, opening during the day and closing at dusk, and can last for several days. After the berries ripen, harvest them promptly, wash off the flesh, and dry the black seeds for storage. Sowing can be done from late April to early May. Sunny weather is best for sowing, with large day-night temperature differences, which not only speeds up emergence but also makes seedlings grow faster.

For sowing soil, clean river sand, plain sandy soil, or pure leaf mold can be used. Pure sand is easy to sterilize but has poor water retention, so seedlings must be transplanted immediately after emergence. The soil must be strictly sterilized. After mixing the soil, put it in a pot, then steam the pot for 1 hour.

For the sowing pot, a shallow purple-clay pot or glazed pot is preferable; wooden pots are best avoided. Both the pot and the bottom drainage material should be washed and dried before use. 2-3 days before sowing, soak the seeds in a 0.3% copper sulfate solution or 1% formalin solution for 5 minutes, then remove them and soak in clean water. Once the seeds swell slightly, they can be sown.

For home use, medical alcohol can also be used for disinfection, but the disinfection time should be short. After soaking the seeds, they must be removed as soon as possible to let the alcohol evaporate, then sown immediately. They can be mixed with fine sandy soil and broadcast. After sowing, gently press the soil flat, soak with water, cover with glass, and place the pot in a warm, shaded spot. Once the seeds begin to emerge, light must be controlled, and the seedling pot moved to a shaded indoor area. Seedlings grown from sowing can bloom after 1 to 2 years of cultivation.

2. Cuttings

When the offsets have grown large enough, we can break off the small pups by hand or with a tool, place them in a cool place to dry. After May, let them dry for a week and then they can be used for cuttings.

For the cutting medium, use three parts each of akadama soil, coarse sand, and furnace slag, plus some activated carbon or rice husk ash. Use a 4——5 cm shallow pot; small pups do not need a deep pot for rooting, and a shallow pot makes it easier to observe the moisture level of the potting soil. Lay the prepared soil from coarse to fine up to the surface, moisten the soil slightly with a spray bottle, and then place the small pups neatly on the surface.

When the potting soil looks dry, spray water promptly. For cacti with fuzzy bodies, do not spray water directly on the small offsets. Because the soil drains well and the pot is relatively shallow, water does not accumulate easily, which readily promotes rooting of the small pups. Most will root after half a month, and the new roots are guaranteed to be healthy and strong (except for a few varieties that are extremely difficult to root).

3. Key Growing Points for Rebutia

1. Variety Selection

Mainly you can choose varieties such as Rebutia marsoneri (Sengwang Qiu), green crown (Rebutia marsoneri cristata), Rebutia aureiflora (Jinzan Qiu), orange-red Rebutia (Taibao Qiu), short-spined Rebutia aureiflora, and red Rebutia marsoneri.

2. Daily Care

For potted Rebutia, the soil can be made from equal parts peat, leaf mold, and coarse sand, plus a small amount of calcareous material. During cultivation, it is easily harmed by red spider mites; in severe cases, the entire body surface quickly turns rust-colored, so the cultivation location must be well ventilated.

Keep the potting soil dry in all four seasons. In hot seasons, pay attention to ventilation and appropriate shading, and maintain the temperature above 5°C in winter. In summer, shade should be provided. During the growing season, water thoroughly, and be careful not to water from the top to prevent water accumulation at the top of the body from causing rot.

The body surface is tender, and the spines are short, fine, and soft, so it is often eaten by slugs and snails, and control measures should be taken. The plant's roots are relatively thick but few, and under potted conditions root absorption is not ideal. The stem base very easily shrivels and turns yellow, so it is advisable to use offset grafting or cuttings to replace aging mother plants.