Why Do Clivia Leaves Wrinkle? Cultivation and Care Methods Explained
What is the standard for an ideal Clivia? A gardening saying tells us: "round, short, wide, thick, hard, patterned, glossy, raised, smooth, upright."
"Round" means the leaf tip should be round. That is, oval-shaped, without any sharp point. The entire plant shape should be round, achieving a fan-like appearance when viewed from the front, with no leaves of uneven length.
"Short" refers to the length of the leaf, which should be around 200 mm. The leaf neck should be short and taper sharply. A single leaf should look like a table tennis paddle.
"Wide" means the width of the leaf itself should be over 100 mm. The spacing between the two longitudinal veins should be wide, about 5 mm or more.
"Thick" means the thickness of the leaf should be over 2 mm.
"Hard" refers to hardness and elasticity; it should feel firm, not spongy.
"Patterned" refers to the contrast in color between the leaf blade and the veins.
"Glossy" means the leaf surface has a shine.
"Raised" refers to the degree of prominence of the veins. The longitudinal and transverse veins should be clearly raised and robust, intersecting at right angles to form a regular ridged pattern.
"Smooth" means the leaf texture is fine and feels silky to the touch.
"Upright" means the leaves stand erect and upward, with the bottom leaves flat and not drooping, and the remaining leaves growing evenly spaced in a tiered arrangement, achieving the perfect plant shape of "a straight line when viewed from the side, a fan when viewed from the front."
Clivia Cultivation
1. When Clivia is exposed to strong light for a long time, not only do the leaves become rough and lose their emerald green color, but they are also prone to sunscald, causing the leaves to suddenly turn yellow and dry up, with severe cases turning the entire leaf yellow. Therefore, shade the plant for two to three hours around noon in summer. Once a leaf has turned yellow, you can cut it off and encourage new leaf growth.
2. If fertilizer and water are excessive and concentrated, if leaf cleaning is poor, or if mold infection occurs, leaf rot can result. The leaves begin to rot from the base, the center, or the outer part, and in severe cases all leaves rot away within five or six days. Control watering promptly and fertilize appropriately to keep the potting soil moist throughout. Once rotting leaves are found, immediately cut away the rotten portions, then sprinkle oxytetracycline powder around the rotten areas for thorough disinfection, and place the plant in a ventilated, well-lit spot.
3. When the temperature rises above 25°C, Clivia growth is inhibited. If fertilization continues, the leaves will become weak and leggy, causing the plant to be unhealthy and even leading to root and stem rot. Over-fertilization can cause newly grown leaves to suddenly curl up. You should replace the soil or continue watering thoroughly several times to flush out and dilute the concentrated fertilizer.
4. During the plum rain season, high humidity, poor ventilation and hot temperatures can cause leaf tips to wither and weaken resistance to disease. Use 0.1% carbendazim or thiophanate for alternating sprays, once every 10 days.
5. Overwatering causes root rot, and the leaves gradually turn yellow and drop from the bottom up. You should dig out the plant, wash off the soil, cut away the rotten diseased roots, and dry it in the sun for four or five days until the roots shrink slightly, then repot. If you often water only lightly, the roots will shrivel and the leaves will also turn yellow and drop from the bottom up. Water thoroughly in time.
6. Clivia has fleshy roots with a relatively weak ability to absorb water, and its leaves are thick and rich in water. If the potting soil is too wet or too dry for a long time, it will cause water to flow backward, and the leaf tips will gradually turn black and rot. Therefore, it is best to keep the potting soil on the dry side. Note that regardless of whether the plant is small, medium or large, pouring water on the central leaves, or frequent rain, or water running into the center, will cause the new central leaves to rot, and in severe cases even the heart will rot. So when watering Clivia, do not pour water on the leaves, and especially avoid pouring it into the central leaves.
7. High temperatures, strong sun, little rain, a dry environment, poor ventilation, poor drainage, or the application of raw fertilizer will all cause leaves to scorch yellow or drop. Use loose, relatively dry soil, apply well-rotted fermented dilute fertilizer, and place the plant in a ventilated, cool environment.
8. Unfermented horse manure or meat bones used as drainage at the bottom of the pot easily breed white nematodes, causing the leaves to scorch yellow. You should change the potting soil and replant.
9. When measles-like yellow spots appear in the center of the leaves, on the surface it looks like a leaf infection, but in reality it is a root problem. For example, overly wet potting soil, or placement in a stuffy, unventilated spot, or the application of raw or concentrated fertilizer will all produce the above symptoms. If too much, too concentrated, or raw fertilizer has been applied, replace the soil immediately. If the placement is unsuitable, move the plant to keep the potting soil on the dry side.
10. Due to mold activity in the potting soil, spots form on the leaves. Disinfect promptly with formalin. If leaf spots have already appeared, wipe the spots with 1000-times oxytetracycline or tobacco stem water soak to control the spread of the spots.
Clivia Care During the Dormant Period
Shading In the hot summer, one of the threats to Clivia is strong light exposure. Taking timely shading measures can avoid or reduce some harm. One method is to move the plant in early summer to a place where it can see sunlight in the morning and evening, or place it under a tree or among flowers to receive diffused light. In midsummer, move it to a place with skylight but no direct sunlight. Place it on a north-facing balcony of a building, under the eaves of a single-story house (the back eave facing south, the front eave facing north), or in a shade shed or indoors. A second method is to build a frame above the plant and shade it with a shade net or bamboo curtain. Spread the net when sunlight comes and roll it up after the sunlight has passed. However, because sunlight intensity varies, the shading degree of the net should differ accordingly.
Heat Protection and Cooling A second threat to Clivia in hot summer is high temperature. One measure is to use water to cool the plant. That is, when the temperature is highest during the day, use a sprayer and watering can to spray water on the leaves and sprinkle water on the ground. You can also place a water trough (basin) under the flowerpot, pad it with sponge (burlap), and place a water vat nearby to increase air humidity and lower the plant temperature. The second is to improve ventilation. That is, place the plant in a place with air circulation to help it dissipate heat and create a cool, ventilated living environment.
Water Control and Fertilizer Suspension Because Clivia is in a dormant or semi-dormant period, its metabolism is slow and growth is stagnant. Combined with the above measures, water consumption is relatively reduced. If watered too much at this time, it will create a harsh environment of high temperature and high humidity, easily causing soil oxygen deficiency and root rot. If watered too little, the root system easily shrivels, and the whole plant may even die. Therefore, water must be controlled as necessary, applied at the right time and in the right amount, keeping the potting soil slightly moist. During the dormant period, because physiological activity is extremely weak and nutrients are basically not consumed, fertilization should be stopped. Otherwise, it will also cause root rot and even death from fertilizer damage.
Explaining Clivia "Arrow Binding"
Unsuitable Temperature The suitable temperature for Clivia to shoot its arrow is 20°C. During this growth period, if the temperature is below 15°C, the arrow stalk is not easy to shoot out, forming the condition of flowers hidden among the leaves. At this time, appropriately raise the indoor temperature to ensure the most suitable temperature for Clivia to shoot its arrow.
Insufficient Temperature Difference During the growth period, Clivia needs a certain day-night temperature difference to facilitate nutrient accumulation. Generally, the daytime temperature should be higher than at night. After flower bud differentiation and before the arrow shoots, the temperature should be controlled at 25°C, with a day-night temperature difference of about 8°C-10°C, and then the flower arrow will shoot out more easily.
Insufficient Fertilization After autumn, Clivia enters the reproductive growth period and requires a large amount of fertilizer. At this time, Clivia about to bloom should appropriately increase the frequency of fertilization, generally once every half month, mainly with phosphorus and potassium fertilizers. You can also spray a 0.2% potassium dihydrogen phosphate aqueous solution on the leaves to help promote arrow shooting and flowering.
Improper Watering During the period when the flower arrow and stalk form, Clivia is at its growth peak and needs more water than usual. If watering is insufficient at this time, the "arrow binding" phenomenon occurs. Appropriately increase the amount of watering; natural water is preferable, and tap water is best after oxidation.