How to Care for Cacti in Winter
As a drought-resistant star in the succulent world, the winter care of cacti poses a challenge for many growers. This article will systematically analyze the 8 key points for cacti to survive the winter from dimensions such as temperature control, water management, and light requirements, helping you create a warm haven for your exclusive desert精灵精灵.
One, Core Elements of Winter Care
1.1 Precise Water Control to Prevent Root Rot
Cacti require strict water control in winter, with no more than 50ml of watering per month when the environmental temperature is below 10℃. It is recommended to use the bamboo skewer test: insert the skewer 2/3 into the potting soil, wait for 2 minutes, and if there is no moisture, then water can be supplemented. In northern heating rooms (18-25℃), a watering frequency of every 15 days can be maintained.
1.2 Smart Ventilation Solutions
Open the windows for ventilation for 1-2 hours daily between 11:00-14:00, avoiding direct draft. A thermometer and hygrometer can be set up to monitor, and when the indoor humidity is >60%, start the circulation fan to maintain air circulation. In southern rainy areas, it is recommended to use a dehumidifier.
1.3 Maximize Light Energy
Use a combination of a south-facing windowsill and reflective film: hang a foil reflector 30cm behind the pot, which can increase the light intensity by 40%. In case of continuous rainy days, supplement with plant growth lights for 4 hours daily (recommended wavelength 640-660nm).
1.4 Staged Temperature Control
Establish a three-level protection system: use a foam box for insulation at 5-10℃; add a heating pad (set at 8-10℃) at 0-5℃; use a double-layer plastic cover plus a warm pack (placed at 20cm intervals) during extreme cold waves.
Two, Advanced Care Techniques
2.1 Soil Improvement Solution
In winter, it is recommended to use a mixed matrix of volcanic rock: vermiculite: coconut bran = 5:3:2, adding 1% charcoal particles to enhance breathability. Pot selection suggestions: red pottery > coarse pottery > plastic pots.
2.2 Disease and Pest Prevention
Apply garlic extract (diluted 1:50) once a month, focusing on the surface of the potting soil and the edges. If scale insects are found, immediately kill them with a 75% alcohol cotton swab.
Three, Special Cases Handling
For frost-injured plants, gradually warm them up: place them in a 5℃ environment for 24 hours → move to a 10℃ environment for 48 hours → resume normal care. If the frost-injured area becomes translucent, it should be cut immediately, and the incision should be coated with carbendazim powder.
By scientifically adjusting the care parameters and combining regular observation and recording, your cacti can not only survive the winter safely but also bloom beautifully in the spring. Remember, the winter needs of the desert精灵 can be summarized as: dry care is better than wet care, insulation is more important than fertilization, and light is more important than watering.