How to grow Haworthia cooperi? Sharing the latest Haworthia cooperi cultivation methods

Haworthia cooperi is a succulent plant in the family Asphodelaceae (order Asparagales), also known as a “soft-leaf” variety among succulents. Haworthia cooperi plants are delicate and compact, rich in variety, with crystal-clear leaf colors that are full of variation, like living works of art, very lovely, and one of the more popular small succulent plant varieties in recent years. Let's take a look at the cultivation methods and precautions for Haworthia cooperi!

Propagation methods for Haworthia cooperi

1. Division propagation: Haworthia cooperi can be divided when repotting, or young plants beside the mother plant can be dug up during the growing season. Both rooted and unrooted offsets can survive; rooted ones can be planted directly, while unrooted seedlings should be dried for 1-2 days until the wound is dry before planting. Newly planted plants should not be watered too much to avoid rot, and normal care can resume after new roots grow.

2. Cutting propagation: Haworthia cooperi produces young shoots in the leaf axils at the lower part of the plant. For species that do not easily produce young shoots, the growing point at the center of the plant can be damaged to encourage shoot sprouting. Once the small shoots grow to 2-3cm, remove them and dry for 2-3 days. After the wound is dry, insert them into the growing medium. Keep the soil semi-dry after insertion, and new roots will grow in 2-3 weeks.

3. Leaf cutting propagation: Choose healthy, plump fleshy leaves and insert them during the growing season into a well-draining medium such as vermiculite or coarse sand. Keep the potting soil slightly moist after insertion. The base of the fleshy leaf easily takes root and produces small shoots. Once the small shoots are somewhat larger, they can be transplanted separately.

4. Seed propagation: Haworthia cooperi can only produce seeds through artificial pollination. This is generally done on a clear morning during flowering. The method is to select two Haworthia cooperi plants flowering at the same time, or pollinate with varieties of the same Haworthia genus such as Haworthia retusa and Haworthia maughanii. Parent plants should have compact rosettes, thick and plump leaves, and high "window" transparency. When pollinating, remove the petals, take the pollen and apply it to the stigma of another plant's flower. Alternatively, the pollen can be removed the previous afternoon, carefully stored, and pollination done the next morning, which gives a higher success rate. Sow the seeds after the plant's seeds mature. Seeds can be sown immediately after collection. The sowing soil can be made by mixing 3 parts vermiculite with 2 parts leaf mold or peat moss. Before sowing, it is best to sterilize the soil at high temperature to eliminate pathogens and insect eggs in the soil. Cover with a glass pane after sowing, and seedlings emerge in about 20 days. After emergence, remove the glass pane, ensure ventilation, do not let the soil become excessively dry, and transplant when the seedlings become too crowded. Some variant plants may appear among the seedlings. You can select young plants with compact rosettes, thick fleshy leaves, high "window" transparency, and prominent vein patterns to keep as stock plants. If you find seedlings with different leaf colors, keep them too, as they might be a precious variegated plant.

Cultivation methods for Haworthia cooperi

Haworthia cooperi prefers a cool, semi-shaded environment, with the main growing period in spring and autumn. It is an “intermediate type” variety among succulents. It is drought-tolerant but not cold-tolerant, and dislikes high temperatures, humidity, and scorching sun exposure; it fears deep shade and also fears waterlogged soil.

1. Light: Give sufficient light during the growing period. If too shaded, the plant will become loose and not compact, with thin, elongated leaves and poor "window" transparency; if the light is too strong, the leaves will grow poorly and turn light reddish-brown, and sometimes strong direct sunlight will burn the leaves, leaving ugly scars; plants grown in semi-shade have thick, plump leaves and high transparency.

2. Water: During the growing period, water according to the principle of “don't water until dry, water thoroughly when you do.” Avoid waterlogging, and do not let rain fall on them, especially not prolonged rain, all to prevent root rot; but do not let them stay dry for too long either, otherwise the plant will not die but the leaves will shrivel, the leaf color will become dull, and it will lack vitality. Haworthia cooperi likes an environment with some air humidity. When the air is dry, you can often spray water on the plant and surrounding environment to increase air humidity. During the growing season, you can also cut off the upper half of a transparent colorless beverage bottle and cover the plant to grow it in a small environment with moist air, which makes the leaves plump and the "window" more transparent. But in the hot summer season, be sure to remove the beverage bottle to prevent the plant from dying due to stuffy heat and humidity.

3. Fertilizer: During the growing period, apply a diluted decomposed liquid fertilizer or a low-nitrogen, high-phosphorus-potassium compound fertilizer once a month to vigorously growing plants. Newly potted plants or weak-growing plants do not need fertilizer; neither do plants during the dormant period in high summer temperatures or low winter temperatures. Fertilization should preferably be done on a clear morning or evening.

4. Four-season care: In high summer temperatures, the plant enters dormancy or semi-dormancy, growing slowly or completely stopping. It can be placed in a ventilated, cool, dry place for care to prevent the stuffy, humid environment from “steaming” the plant to death, and avoid scorching sun exposure. Do not water too much, stop fertilizing, and wait until autumn cools down to resume normal care. In winter, if the nighttime minimum temperature is around 8°C and daytime is above 15°C, the plant can continue to grow and should be watered normally; if watering is restricted to make the plant dormant, it can tolerate low temperatures of 3°C~5°C, even short-term 0°C low temperatures. If kept in a low-temperature environment below 5°C for a long time, the plant will not die, but frost damage marks will remain on the leaves. Therefore, the overwintering temperature for Haworthia cooperi is best maintained above 5°C.

Precautions for caring for Haworthia cooperi

1. Roots: Because the root system of Haworthia cooperi secretes acidic substances, causing soil acidification and making the roots age and become hollow, repot once a year in spring or autumn. During the growing period, if the plant stops growing and the leaves shrivel, it is very likely that the roots are damaged, and the pot should be turned out promptly to tidy the root system. When repotting, cut off aged and hollow roots, shorten overly long roots, keep the thick white new roots, and replant with fresh growing medium. Newly planted plants can be sprayed frequently but watered sparingly, which helps the plant recover growth as quickly as possible.

2. Soil: The soil should be loose, fertile, well-draining and breathable, contain lime, and have relatively coarse particles. A common mix is 2 parts leaf mold and 3 parts coarse sand or vermiculite, with a small amount of bone meal and other calcareous materials mixed in. For high-grade varieties such as Haworthia cooperi 'Souhaku' and Haworthia cooperi var. pilifera, artificial synthetic materials such as akadama, ranma, kiryu, and Satsuma soil can also be used, but an appropriate amount of peat or sphagnum peat should be added to increase the soil's organic matter content.

3. Flowers: The flowers of Haworthia cooperi have low ornamental value. If you do not want to keep seeds, you can pull off the flower stalk from the base to avoid consuming too many nutrients and affecting normal plant growth. Note that the flower stalk should not be cut with scissors; it should be pulled off by rocking it side to side with your hand, which prevents residual flower stalk from remaining between the leaves and adversely affecting the growth of new leaves later.