What's wrong with black leaves?
As an "air purifier" in the home green industry, spider plants are deeply loved for their elegant hanging posture and strong adaptability. However, problems such as blackening and softness of leaves are often encountered during the maintenance process, which not only affects the ornamental value, but also serves as a distress signal from the plants. This article will provide you with professional solutions by systematically analyzing the cause of the problem. Three major causes of blackening of spider leaf 1. Although the chlorophytes on leaves burned by excessive light have certain resistance to negative,"sunburn makeup" will appear when exposed to direct light for a long time. It is recommended to place it 1 meter away from the east-facing window in spring and summer, and soft direct light can be accepted in autumn and winter. If black spots appear, move to a scattered light environment immediately and use a spray can to atomize and replenish water (twice a day). New young leaves will be visible after 2 weeks. 2. The root crisis caused by stagnant water "Better dry than wet" is an iron rule for watering. If the soil moisture is greater than 70% for 3 days, roots will rot. During first aid, you can tilt the flowerpot to dump the stagnant water, and use chopsticks to poke 5-6 ventilation holes in the soil surface. In severe cases, remove the pot and prune: cut off the black and soft rotten roots, retain 5cm of healthy roots, soak in carbendazim solution for 30 minutes, and replace with a new substrate with perlite: vermiculite =3:1. 3. For the hidden hazards of soil hardening, it is recommended to replace the substrate every spring, and the formula of legus soil + river sand + coconut bran (4:3:3) is preferred. Regular loosening can be combined with a bamboo loosening rake to control the depth within 5 cm to avoid damaging the capillary roots on the surface. When the hardening is severe, it can be watered with a beer solution diluted 500 times. The carbonic acid component can effectively soften the soil. Guidelines for Repair of Soft Chlorodendron Leaves Temperature Control Strategies 20-25℃ is the golden temperature band, and needs to be kept>10℃ in winter. When the tip of the leaf becomes transparent and soft, which is often a precursor to low-temperature frostbite, it is necessary to put a double-layer plastic bag for insulation immediately, and a mineral water bottle filled with 40 ° C warm water should be placed in the bag. Root system recovery plan For wilting caused by soil hardening, you can first pour thoroughly root-fixing water. When the pot soil is semi-dry, use a horticultural three-tooth rake to loosen the soil in a circular manner along the pot edge to a depth of about 3 cm. Simultaneous application of 0.1% potassium dihydrogen phosphate solution promotes the germination of new roots. Light intensity management In summer, 60% of the light needs to be blocked from 10:00-15:00. White gauze curtains or sunshade nets can be used. If sunburn spots already appear, 1/2 of the damaged leaves can be cut off and healthy parts can be retained for photosynthesis. Combined with foliar spraying aloe juice diluted 200 times every week, it can enhance leaf stress resistance.
Through scientific diagnosis and precise intervention, about 85% of spider plants can recover within one month. In daily maintenance, it is recommended to use a hygrometer to measure soil moisture content every month, and apply decomposed soybean cake fertilizer every quarter to supplement nutrients. Remember that healthy new leaves of spider plants should grow at a rate of 1-2 leaves per week. When you find that the plants have re-emerged young leaves with silver-edged edges, it means that the maintenance measures have taken effect.