How to grow Sempervivum arachnoideum (Cobweb Houseleek) succulents until they fill the pot? Growing methods and precautions

Sempervivum arachnoideum is a succulent with a rather unusual appearance. Its surface is wrapped in a layer of white threads, looking a bit like a spider web. But this actually makes it stand out and makes more people want to grow it. So before growing it, you need to understand its growing techniques.

How to grow Sempervivum arachnoideum succulents until they fill the pot

1. Temperature. The suitable temperature for Sempervivum arachnoideum growth is 15°C-25°C. When the temperature is below 5°C, Sempervivum arachnoideum stops growing. So you need to maintain a certain temperature while growing it.

2. Soil mix. The growing environment of Sempervivum arachnoideum requires good soil drainage, so choose the soil carefully. Use peat mixed with perlite, then add coal cinders, in a rough ratio of 1:1:1. To achieve breathability and also prevent the plant from touching the soil surface, you can spread a layer of clean granular river sand on top, with the river sand no larger than 5 mm in size.

3. Watering. Sempervivum arachnoideum dislikes damp heat, so reduce the frequency of watering, but the amount of water should gradually increase as the temperature rises, following the principle of “water thoroughly only when the soil is completely dry, do not water if it is not dry.”

4. Fertilizing. In spring, fertilizing should focus on nitrogen fertilizer, supplemented by phosphorus and potassium fertilizer, and remember to apply light fertilizer frequently. It is best to wait until the spring temperature is stable before fertilizing. In the lower reaches of the Yangtze River region, fertilizing around April can be extremely effective.

Growing methods for Sempervivum arachnoideum

1. Sempervivum arachnoideum is in its growing period in spring, so it needs full sun, but be careful to ventilate frequently and keep the air circulating.

2. Sempervivum arachnoideum prefers a cool environment. Because summer temperatures are too high, Sempervivum arachnoideum enters dormancy in summer. At this time, place Sempervivum arachnoideum in a shaded environment, strengthen ventilation, and stop watering when the room temperature reaches above 35°C (Sempervivum arachnoideum is a drought-tolerant plant and will not die from short-term lack of water), otherwise it will rot very easily. When the room temperature has not reached 35°C, the watering amount should be maintained at 3 to 4 times per month, and be careful to use only a small amount.

3. Autumn, like spring, is part of the growing period for Sempervivum arachnoideum, so it also needs full sun while paying attention to ventilation.

4. Sempervivum arachnoideum is not only drought-tolerant but also cold-tolerant, so in winter, when the temperature is below 3°C, gradually stop watering. When the temperature drops to 0°C, keep the potting soil dry, and then Sempervivum arachnoideum can safely pass the winter. But be careful to try not to place Sempervivum arachnoideum in an environment below minus 5°C.

Precautions for Sempervivum arachnoideum

1. Propagation. Sempervivum arachnoideum tends to form clusters, and propagation methods include seed sowing, division, and beheading. Generally, division is used for propagation.

2. Watering. When watering, do not pour water directly on the plant; pour it into the soil to avoid the cobweb threads falling off from contact with water, and also avoid pouring water into the center, which would cause the inside of Sempervivum arachnoideum to rot.

3. Light. Spring and autumn are the growing periods, and full sun is acceptable. Summer is the dormant period, and it needs ventilation and shade, watering around the edge of the pot once a month. In winter, keep the potting soil dry, and keep the temperature as close as possible to below zero degrees, not less than five degrees.

Propagation methods for Sempervivum arachnoideum

1. Division propagation. Division propagation is the most commonly used propagation method for Sempervivum arachnoideum. First remove the small offsets, rinse the small offsets in clean water, then place them in a cool place to dry until they are completely dried before use. Then prepare slightly moist soil in a flower pot, do not press it firm, just keep it loose. For cuttings, insert the dried offsets directly into the soil, then care for them in a cool, ventilated place, and you only need to wait for roots to form.

2. Leaf cuttings and stem cuttings propagation. Sempervivum arachnoideum also commonly uses leaf cuttings and stem cuttings propagation. As long as it is a clustered plant, stem cuttings and leaf cuttings can be used for propagation. When propagating, use the offsets that emerge from the branches; leaf cuttings are also very easy, so using leaf cuttings and stem cuttings is convenient and simple, and the survival rate is also good.

If you want to grow Sempervivum arachnoideum succulents until they fill the pot, you must understand its growth habits, then begin cultivating it slowly. When cultivating it, it does not tolerate waterlogging, so you must water appropriately. In summer, it should not be exposed to high temperatures for long periods, otherwise it will cause the plant to die!