What should I do if the tips of gardenia leaves are dry and brown?
The dryness and browning of gardenia leaf tips is a common maintenance problem, which not only affects the ornamental value, but also serves as a distress signal from the plant. This article provides system solutions for different causes to help you quickly diagnose and take effective measures. 1. Key points of water management 1.1 Excessive watering harms the continuous moisture of the basin soil, which will lead to hypoxia in the roots and cause root stuttering. At this time, the plant was unable to absorb (S-Y) components normally, which was manifested by browning of the leaf tip and spreading to the entire leaf, and the growth of new leaves was stagnant. 1.2 The scientific water replenishment plan adopts the "dipping basin method" to treat accumulated water: immerse the entire flowerpot in dry vermiculite for 2 hours, and use the siphon principle to drain out excess water. Daily maintenance follows the principle of "seeing dry, seeing wet", watering once every 5-7 days in spring and autumn, and appropriately shortening it to 3-4 days in summer. 2. Light control strategy 2.1 Repair of strong light burns in summer from 10:00 to 15:00, a sunshade net needs to be set up to filter 40% of direct light. Sunburned plants should be moved to the east-facing window sill and sprayed with 0.1% potassium dihydrogen phosphate solution to repair the damage. 2.2 Operation specifications for filling light: Ensure 4 hours of direct light every day in winter, and use plant fill light (blue light with wavelength of 400- 500nm + red light of 600 - 700nm) to supplement 2 hours of light every day in rainy days, and keep the distance above 50cm. 3. Optimization of nutrient supply 3.1 Emergency treatment of fertilizer damage When fertilizer damage is discovered, immediately use clean water to irrigate the roots three times continuously, and use activated carbon particles (10g/pot) to absorb excess fertilizer. New soil needs to be replaced for severe fertilizer damage. The matrix ratio is peat soil: perlite: humus soil =5:3:2. 3.2 Scientific fertilization cycle Special fertilizer (N-P-K=15-5-30) is applied every 15 days during the growth period (March to September), and iron chelate fertilizer is applied during the flower bud differentiation period. Stop fertilization during winter hibernation and keep the basin soil slightly dry. 4. Advanced Maintenance Skills 4.1 Soil Acid-Base Adjustment Test the soil pH value every month and maintain it between 5.0 and 6.5. The pH can be adjusted with white vinegar water (5ml/time) diluted 100 times or ferrous sulfate solution (0.2% concentration). 4.2 Disease prevention measures Regularly spray difenoconazole (2000 times liquid) to prevent leaf blight, and use Bacillus subtilis (100 million CFU/g) biological inoculant to enhance plant disease resistance.
By systematically adjusting the three major elements of water, light, and nutrition, and regularly testing the soil environment, the browning problem of gardenia leaf tips can be effectively prevented and controlled. It is recommended to establish a maintenance log to record each treatment measure and plant response, and gradually master the personalized maintenance plan. Timely intervention when early symptoms are discovered can avoid more than 90% of leaf damage.