Cultivation and Protection Management Methods for Potted ZZ Plants

The cultivation and protection management methods for ZZ plants are a question netizens often ask, so here is a brief summary of how to grow potted ZZ plants. To grow a ZZ plant well, it is important to be familiar with its growth habits. The ZZ plant is a perennial evergreen herbaceous plant belonging to the genus Zamioculcas in the family Araceae. It is a very rare foliage plant with underground tubers, native to the tropical (grassland) climate zone of eastern Africa with relatively low rainfall. It prefers a warm, hot and slightly dry, semi-shaded environment with small annual average temperature fluctuations. It is relatively drought-tolerant, but fears cold, and hates strong direct sunlight, heavy sticky soil and water accumulation in the pot. If the pot soil has poor permeability, it can easily cause its tubers to rot. It requires loose, fertile soil that drains well, is rich in organic matter, and is acidic to slightly acidic. It has strong sprouting ability; after cutting off the thick compound leaves, new leaves will quickly sprout from the top of its tuber. The specific care and management methods are described below:

Temperature

The suitable growth temperature is 20-32°C. Whether potted or planted in the ground, it requires small annual average temperature fluctuations. For commercial cultivation, it is best to grow it in a temperature-controlled greenhouse. Every summer, when the temperature reaches above 35°C, the plant grows poorly, and measures such as adding black shade netting and spraying water around the surrounding environment should be taken to lower the temperature, creating a suitable environment with appropriate ambient temperature and relatively dry conditions. In winter, it is best to maintain a greenhouse temperature above 10°C. If the room temperature drops below 5°C, the plant is prone to cold damage, which can seriously threaten its survival. In late autumn and early winter, when the temperature drops below 8°C, it should be promptly moved indoors to a well-lit location. Throughout the overwintering period, the temperature should be kept between 8°C and 10°C, which is relatively safe and reliable.

Light

The ZZ plant likes light and also has strong shade tolerance, so it should be provided with an environment that has good sunlight but also a certain degree of shade. It hates strong direct light, and especially should avoid the scorching sun after long rain and sudden clearing in late spring and early summer, as well as the 5-6 hours of unobstructed strong light baking around noon in summer, otherwise the newly sprouted tender leaves are very easily scorched. For commercial cultivation, from late spring to mid-autumn, it should be placed under a shade shed with 50-70% shading, but it should not be too dark, otherwise the newly sprouted tender leaves will become slender, the leaf color will turn yellow and dull, and the leaflets will be sparsely spaced, affecting the plant's compact and beautiful form. For potted plants moved into the greenhouse in winter, supplementary lighting should be provided. Keeping the pot soil on the dry side allows the plant to remain disease-free year-round. In addition, the newly sprouted pinnate compound leaves do not show obvious phototropism, and the plant form remains good.

Water

To care for a potted ZZ plant well, effort should be made to create an environment that is both moist and on the dry side. For commercial cultivation, for plants placed in a greenhouse, when the room temperature reaches above 33°C, the plant should be sprayed with water once a day. Because this plant has strong drought tolerance, it is best to keep the pot soil slightly moist and on the dry side, but occasionally overwatering or over-fertilizing will not cause root rot. In winter, pay attention to spraying water on the leaf surfaces and the surrounding environment to bring the relative air humidity above 50%. After mid-autumn, reduce watering, or replace watering with spraying, to help the newly sprouted tender leaves overwinter safely. In addition, in winter, special attention should be paid to not letting the pot soil become overly wet; it is better to keep it on the dry side, otherwise under low temperature conditions, overly wet pot soil is more likely to cause root rot, or even the death of the entire plant.

Soil

Due to the special climatic conditions of its place of origin, the ZZ plant has developed strong drought resistance, so the basic requirement for the growing medium is good permeability. The basic requirement for the growing medium is good permeability. The growing medium is mostly a mix of peat, coarse sand or rinsed coal cinders with a small amount of garden soil, with its pH adjusted to between 6 and 6.5, in a slightly acidic state. Because of its large tubers, well-developed root system and relatively long pinnate compound leaves, during the growing season its growth should be observed promptly to decide whether to repot and change the soil. Always keep the growing medium well-aerated to help create a root environment with good air and water drainage. During the plum rain season, check frequently, and if water accumulation is found in the pot, promptly repot and change the soil.

Fertilizer

The ZZ plant is relatively fond of fertilizer. In addition to adding an appropriate amount of composted cake fertilizer or multi-element slow-release compound fertilizer to the growing medium, during the growing season, a mixed solution of 0.2% urea plus 0.1% monopotassium phosphate can be applied 2-3 times a month, or a balanced fertilizer 20-10-20 (20-20-20) can be applied at a concentration of 200-250 ppm combined with calcium nitrate. After mid-autumn, to help it overwinter safely, nitrogen fertilizer should be stopped, and 0.3% monopotassium phosphate solution should be applied 2-3 times consecutively to promote the hardening and filling of the young leaf rachises and newly sprouted leaves. After the temperature drops below 15°C, all forms of topdressing should be stopped to avoid fertilizer damage to the roots under low temperature conditions.

12Next Page

Cultivation and Protection Management Methods for Potted ZZ Plants

        The cultivation and protection management methods for ZZ plants are a question netizens often ask, so here is a brief summary of how to grow potted ZZ plants. To grow a ZZ plant well, it is important to be familiar with its growth habits. The ZZ plant is a perennial evergreen herbaceous plant belonging to the genus Zamioculcas in the family Araceae. It is a very rare foliage plant with underground tubers, native to the tropical (grassland) climate zone of eastern Africa with relatively low rainfall. It prefers a warm, hot and slightly dry, semi-shaded environment with small annual average temperature fluctuations. It is relatively drought-tolerant, but fears cold, and hates strong direct sunlight, heavy sticky soil and water accumulation in the pot. If the pot soil has poor permeability, it can easily cause its tubers to rot. It requires loose, fertile soil that drains well, is rich in organic matter, and is acidic to slightly acidic. It has strong sprouting ability; after cutting off the thick compound leaves, new leaves will quickly sprout from the top of its tuber. The specific care and management methods are described below:

        Temperature

        The suitable growth temperature is 20-32°C. Whether potted or planted in the ground, it requires small annual average temperature fluctuations. For commercial cultivation, it is best to grow it in a temperature-controlled greenhouse. Every summer, when the temperature reaches above 35°C, the plant grows poorly, and measures such as adding black shade netting and spraying water around the surrounding environment should be taken to lower the temperature, creating a suitable environment with appropriate ambient temperature and relatively dry conditions. In winter, it is best to maintain a greenhouse temperature above 10°C. If the room temperature drops below 5°C, the plant is prone to cold damage, which can seriously threaten its survival. In late autumn and early winter, when the temperature drops below 8°C, it should be promptly moved indoors to a well-lit location. Throughout the overwintering period, the temperature should be kept between 8°C and 10°C, which is relatively safe and reliable.

        Light

        The ZZ plant likes light and also has strong shade tolerance, so it should be provided with an environment that has good sunlight but also a certain degree of shade. It hates strong direct light, and especially should avoid the scorching sun after long rain and sudden clearing in late spring and early summer, as well as the 5-6 hours of unobstructed strong light baking around noon in summer, otherwise the newly sprouted tender leaves are very easily scorched. For commercial cultivation, from late spring to mid-autumn, it should be placed under a shade shed with 50-70% shading, but it should not be too dark, otherwise the newly sprouted tender leaves will become slender, the leaf color will turn yellow and dull, and the leaflets will be sparsely spaced, affecting the plant's compact and beautiful form. For potted plants moved into the greenhouse in winter, supplementary lighting should be provided. Keeping the pot soil on the dry side allows the plant to remain disease-free year-round. In addition, the newly sprouted pinnate compound leaves do not show obvious phototropism, and the plant form remains good.

        Water

        To care for a potted ZZ plant well, effort should be made to create an environment that is both moist and on the dry side. For commercial cultivation, for plants placed in a greenhouse, when the room temperature reaches above 33°C, the plant should be sprayed with water once a day. Because this plant has strong drought tolerance, it is best to keep the pot soil slightly moist and on the dry side, but occasionally overwatering or over-fertilizing will not cause root rot. In winter, pay attention to spraying water on the leaf surfaces and the surrounding environment to bring the relative air humidity above 50%. After mid-autumn, reduce watering, or replace watering with spraying, to help the newly sprouted tender leaves overwinter safely. In addition, in winter, special attention should be paid to not letting the pot soil become overly wet; it is better to keep it on the dry side, otherwise under low temperature conditions, overly wet pot soil is more likely to cause root rot, or even the death of the entire plant.

        Soil

        Due to the special climatic conditions of its place of origin, the ZZ plant has developed strong drought resistance, so the basic requirement for the growing medium is good permeability. The basic requirement for the growing medium is good permeability. The growing medium is mostly a mix of peat, coarse sand or rinsed coal cinders with a small amount of garden soil, with its pH adjusted to between 6 and 6.5, in a slightly acidic state. Because of its large tubers, well-developed root system and relatively long pinnate compound leaves, during the growing season its growth should be observed promptly to decide whether to repot and change the soil. Always keep the growing medium well-aerated to help create a root environment with good air and water drainage. During the plum rain season, check frequently, and if water accumulation is found in the pot, promptly repot and change the soil.

        Fertilizer

        The ZZ plant is relatively fond of fertilizer. In addition to adding an appropriate amount of composted cake fertilizer or multi-element slow-release compound fertilizer to the growing medium, during the growing season, a mixed solution of 0.2% urea plus 0.1% monopotassium phosphate can be applied 2-3 times a month, or a balanced fertilizer 20-10-20 (20-20-20) can be applied at a concentration of 200-250 ppm combined with calcium nitrate. After mid-autumn, to help it overwinter safely, nitrogen fertilizer should be stopped, and 0.3% monopotassium phosphate solution should be applied 2-3 times consecutively to promote the hardening and filling of the young leaf rachises and newly sprouted leaves. After the temperature drops below 15°C, all forms of topdressing should be stopped to avoid fertilizer damage to the roots under low temperature conditions.

        Pest and Disease Control

        Cold damage: When the winter temperature drops below 5°C, combined with damp pot soil, the plant's tender leaves are prone to falling over from cold damage, and in severe cases it can cause tuber rot, making it very difficult to revive.

        Control method: For commercial cultivation, during the overwintering period, the greenhouse temperature should be maintained no lower than 10°C, and the pot soil should be kept in a slightly dry state.

        Sunburn: In the hot summer, or in clear weather after long rain and sudden clearing, or for potted plants that have been kept indoors for a long time and have just been moved outdoors for restorative care, direct exposure to sunlight can easily scorch their tender leaves, causing parts of the leaves to lose green and turn white, or the entire leaf to be scorched, with the necrotic parts later turning brown and black.

        Brown spot disease: This disease mostly occurs on the leaves, with nearly round lesions ranging from grayish-brown to yellowish-brown, with slightly darker edges. This disease is prone to occur under conditions of high temperature and high humidity with poor ventilation. Control method: When a small number of diseased leaves are found, promptly remove and destroy them. In the early stage of the disease, spray the leaves with 50% carbendazim wettable powder at 600 times dilution or 40% chlorothalonil suspension at 500 times dilution, once every 10 days, for 3-4 consecutive times, and the control effect is relatively good.

        Control method: After summer begins, promptly move the plant to a semi-shaded environment. In late spring and early summer after long rain and sudden clearing, shade the potted plant as early as possible.

        Scale insects: In environments with poor ventilation and insufficient light, the leaves of the ZZ plant are prone to damage from scale insect feeding.

        Control method: For commercial cultivation, during the peak hatching period of the nymphs, spray 20% buprofezin wettable powder at 1000 times dilution, and the insecticidal effect is good.

        Propagation Techniques

        Division

        In April, when the outdoor temperature reaches above 18°C, remove the large ZZ plant from its pot, shake off most of the old soil, separate it from the weak points where the tubers join, apply sulfur powder or plant ash to the wounds, and pot them separately. Be careful not to bury them too deep when planting; burying the top of the tuber 1.5-2 cm below the soil surface is sufficient. In addition, based on the characteristic that ZZ plant tubers have dormant buds, a large single tuber can be cut into small pieces each with 2-3 dormant buds. After the wounds have dried and healed, first bury and plant them in slightly moist fine sand, and after the cut small tubers grow into independent plants, pot them separately.

        Cuttings

        The cuttings can use a single small leaflet, a section of leaf rachis with 2 leaves attached, or a section of leaf rachis alone. In terms of rooting results, cuttings made from leaf rachises with leaves attached root faster, have a higher sprouting rate, and more easily form larger tubers. Insert a single leaf into a mixed medium of river sand and vermiculite. After 10-14 days, a small rooted bulbous stem will form at the base of the leaf. After 2-3 months of cultivation, it can grow into a small plant, but under normal circumstances the seedling formation rate is not high. If leaf rachises or leaf rachises with leaves are used as cuttings, the medium can be ordinary fine sand, or a medium prepared by mixing peat soil, perlite and river sand in a 3:1:1 ratio. The insertion depth of the cutting is 1/3 to 1/2 of the cutting length, leaving only the leaves outside the medium. After spraying thoroughly with water, place it in a shaded area, maintain an ambient temperature of 25°C-27°C, and depending on the dryness and moisture of the medium, spray the leaf surfaces 1-2 times a day, keeping the medium slightly moist, but never overly damp, otherwise the cuttings will rot and the propagation will fail. When the cuttings have formed a certain root system, the middle of the root gradually expands to form a small bulbous tuber. The tuber gradually enlarges. Some relatively tender cutting leaves will turn yellow and die after potting due to high temperature or poor water management, but the tuber can survive. Old mature leaves and cuttings with the entire leaf stalk can also maintain green color and vitality. A small number of tubers can sprout and grow new leaves in the same year, but the growth vigor is weak and growth is slow. The following year, the tuber will grow thick new shoots and grow normally.