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To make the colocasia grow healthily, we need to pay much attention to its environment, including location, water, humidity and fertilization, temperature, propagation, pot transfer and so on. Here MAYUN shows you the specific demands of the environment.
Although bright indirect sunlight is ideal, if possible, bask in the morning or late afternoon. If it is located in the shade, dust the foliage from time to time to improve light capture efficiency. Never expose your plant to strong sunlight for long periods of time; too much light can cause the leaves to turn white and fade.
Do not place calla lilies in an environment that is susceptible to extreme heat or direct sunlight, such as a south-facing greenhouse, or within four meters of a running radiator.
Allow one-third of the soil to dry out between irrigations, while reducing it further in the fall and winter. Symptoms of under-watering include stunted growth, browning of leaf margins and yellowing of leaves. Symptoms of overwatering include collapsed stems, yellowing leaves and plant death. If you feel that overwatering is the culprit, remove the affected leaves, roots and soil and replace them with a fresh batch of composted houseplants.
The species originated in Southeast Asia, which means high humidity is necessary for quality growth. Spray both sides of the leaves once a week in summer and twice a week in winter; leaf tip browning is an important sign that the surrounding air is too low in humidity. A quick monthly rinse moisturizes the leaves, eliminates dust particles and helps reduce the number of pests, especially spider mites.
Fertilize every four days during the growing season and every six days in the fall and winter, using a fertilizer labeled "houseplant". Do not apply "ready-to-use" products to the soil without pre-watering, as it may burn the roots and cause the leaves to turn yellow.
Basal offsets - Your plants will produce multiple basal offsets that can be separated once they have sufficient root systems and are more than 25 cm tall. If possible, water 24 hours before the main event begins to reduce the risk of transplant shock when their dry root systems are overused. Remove the plant from the pot and place your fingers close to the nodal joints - it may be necessary to remove soil for better contact. Push down on the selected offset until you hear a click. Separate the foliage and its root system from the mother plant, being mentally aware of the high risk of damage. Transplant a fresh batch of "houseplant" soil into an appropriately sized pot. Keep the soil evenly moist and place it in a bright, indirect location, away from any direct sunlight. After eight weeks, follow the care tips above and consider them as normal specimens!
12° - 30°C (54 ° - 86 °F)
H1b (Hardiness Zone 12) - can be grown outdoors in summer in a sheltered spot at temperatures above 12 °C (54 °F), but can also be left indoors. If you decide to take this plant outdoors, don't subject it to more than an hour of direct sunlight per day, as it can cause sunburn. Keep an eye out for pests regularly, especially when reintroducing it indoors.
Up to 1m in height and width, reaching its final height in about 5-10 years. Calla lilies are best grown under overhead lighting to match their growth structure; locations with horizontal light sources (such as the corners of a room) can lead to stunted, uneven growth.
Remove yellow or drooping foliage and plant debris to promote better growing conditions. When pruning, always use clean scissors or shears to reduce the chance of bacterial and fungal diseases. Never cut through yellowed tissue as this can lead to further damage such as disease or bacterial infection. Remember to make clean cuts, as overly damaged wounds may shock the plant and lead to reduced growth and health.
Since Calla lilies are part of the Tenebrionaceae family, they do not have showy flowers. Like the flowering bodies of peace lilies, their flowers consist of white or green spathes (spoon shaped shells) and the spathes are the pollination site. The flowers can last up to five days and are usually visible in late spring or early summer at about 30 cm above the soil line.
Every two to three years, use a pot labeled "houseplant" and a well-drained pot of the next size. Hydrate plants 24 hours before repairing roots to prevent the risk of transplant shock. For those in darker locations, add a thin layer of small gravel to the bottom of the pot to improve drainage and downplay overwatering. Click here for a detailed step-by-step guide on transplanting, or follow this link for information on potting for root rot.
Keep an eye out for mealybugs, red spiders, scales and thrips, which can appear in small holes in and underneath the leaves. Common diseases associated with calla lilies are root rot, red leaf spot, gray mold, powdery mildew and southern blight - click here for more information on these issues.
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