Do succulents prefer acidic or alkaline soil?
Holding the plump leaves,新手 horticulturists often wonder: are succulents better suited to acidic or alkaline soil? There are significant differences in the soil pH requirements of different genera, and choosing the wrong substrate not only affects the condition but can also lead to root rot and death. This article will start from the native environment of the plant and explain the soil preferences and scientific adjustment methods of different succulents.
The native environment of succulents and soil pH
Mountain succulents prefer slightly acidic substrates
Mountain succulents such as Crassulaceae and Aizoaceae are mainly distributed in areas with limestone topography such as South Africa and Mexico, and their roots have long been adapted to slightly acidic soil with a pH of 5.5-6.5. This type of soil is rich in humus and has good drainage. It is recommended to use a mixture of peat soil: perlite: volcanic rock = 5:3:2.
Desert succulents need a weakly alkaline environment
Cactaceae and some Euphorbiaceae species are native to desert areas with a pH of 7.2-8.3 and require the addition of 5%-10% rice husk charcoal or fine sand to adjust alkalinity. Northern horticulturists can directly use garden soil mixed with 10% limestone particles, while it is recommended to sprinkle wood ash every quarter in the south.
Three practical solutions for soil acidification
Natural leaf mold soil improvement method
Collect the decomposed leaf soil from broad-leaved forests such as oak and pine, disinfect it at high temperature, and mix it into the planting substrate at a ratio of 40%. It is necessary to combine it with 30% red jade soil to enhance breathability and prevent waterlogging that can cause black rot.
Chemical reagent adjustment solution
Apply a 0.2% ferrous sulfate solution (1g mixed with 500ml of water) every month, or choose a chelated iron preparation. It is recommended to dilute the alum fertilizer water to 800 times and water every 20 days during spring and autumn.
Safe use of edible white vinegar
Use sodium-free white vinegar diluted at a ratio of 1:200 as a substitute for regular watering. Be careful not to spray the leaf heart and it is recommended to use it only 3-4 times a year, keeping the pH value within 6.0±0.3.
Key points for caring for alkaline soil
The recommended soil mix for desert succulents is: coarse river sand 40% + garden soil 30% + bone meal 10% + vermiculite 20%. Supplement with oyster shell powder once every half a year and sprinkle diatomaceous earth before the rainy season to prevent root mealybugs.
By testing the soil pH, scientifically preparing the soil according to the characteristics of the succulent variety, and regularly adjusting the pH, the plant can present the best condition. Remember: mountain varieties prefer acidic to alkaline, while desert varieties avoid acidity and prefer calcium; by following this principle, you can grow plump and healthy succulents.