Techniques for Checking Dry and Wet Conditions
In the process of plant care, over 68% of potted plant deaths are directly related to improper watering. The "dry and wet" technique, known as the golden watering rule in horticulture, can effectively solve the two major problems of waterlogging and root rot, as well as drought and wilting. This article will guide you through the core technology of plant care using the four-level soil moisture detection method and scientific watering techniques.
One: The Four-Level Detection Method for Potted Soil Moisture
Three-Step Physical Detection
Knocking Method: Gently tap the upper part of the pot with your knuckles; a crisp sound (＞60 decibels) indicates the soil is completely dry, while a dull sound (＜40 decibels) means the moisture level is appropriate. This method is especially suitable for containers with good breathability, such as terra cotta pots.
Finger Test: Insert your index finger 2cm deep into the soil layer; if it feels hard and not sticky, it indicates that the water content is below 15%. For shallow-rooted plants like succulents, adjust the detection depth to 1cm.
Visual Assistance for Judgment
Surface Soil Color Analysis: Moist soil is dark brown (RGB: 89, 69, 55), while dry soil turns grayish-white (RGB: 180, 175, 165). It is recommended to compare the color difference between the potting soil and new soil under natural light.
Pinching Test: Take 3g of surface soil and knead it; if it is powdery (particle diameter ＜0.5mm), it needs immediate watering, while a clumpy texture (particle diameter ＞2mm) should be maintained.
Two: Practical Guide for Scientific Thorough Watering
Stepwise Penetration Method
Follow the principle of "small amounts multiple times," watering three times at 5-minute intervals: first, moisten the surface (20% water volume), second, activate the middle layer (50%), and third, ensure thorough watering of the bottom layer (30%). Using a narrow-spouted pot to slowly pour water along the pot wall makes it easier to penetrate.
Drainage System Verification
Water until water continuously flows out of the bottom hole, and then collect the amount of water discharged: for a 15cm diameter pot, the discharge should be 150ml; for a 30cm diameter pot, 500ml is needed. Pay attention to check for accumulated water in the saucer, and discard excess water within 30 minutes.
Three: Seasonal Adjustment Plan
Keep the regular "dry and wet" rhythm in spring and autumn, increase watering frequency by 20% in high summer temperatures (＞30℃), and extend the watering interval by 1.5 times in low winter temperatures (＜15℃). For plants with fleshy roots (like orchids), increase the observation period by 3 days, and for plants with capillary roots (like ferns), shorten the drying time by 1/3.
By observing and recording for 2-3 months, establish a personalized watering calendar. It is recommended to use a soil moisture meter to assist in monitoring, keeping the moisture content within the optimal range of 18-25%. Mastering these techniques will help you avoid more than 90% of watering mistakes, keeping the plant roots healthy.