Is garden soil or humus soil better for growing orchids
As a traditional famous flower in China, the root system of orchids is particularly sensitive to the soil environment. Choosing the right growing medium is not only related to the health of the plant but also directly affects the differentiation of flower buds and the quality of flowering. This article will systematically analyze the soil mysteries of orchid cultivation from the characteristics of the growing medium, mixing schemes to maintenance points.
One, comparison of garden soil and humus soil characteristics
1.1 Advantages and disadvantages of using garden soil to grow orchids
Although ordinary garden soil is easy to obtain, it has obvious defects: excessive stickiness can easily cause compaction, and poor drainage can lead to waterlogging and root rot. Statistics show that 73% of the failures in growing orchids by beginners are related to the improper use of garden soil.
1.2 Core advantages of humus soil
Humus soil contains 30%-45% humus and has natural slow-release fertilizer effects. Its loose structure can increase the breathing efficiency of orchid roots by 40%, making it especially suitable for the growth and development of succulent roots.
Two, three principles of scientific soil mixing
2.1基准 line of breathability and drainage
The ideal growing medium needs to ensure a porosity of >35%, which can be achieved by adding granular materials such as volcanic stones and ceramsite. It is recommended to turn over the pot and replace the growing medium every two years to maintain structural stability.
2.2 Nutrition continuous supply plan
Using a layered structure: the bottom layer is laid with 5cm fermented pine bark, the middle layer is mixed with bone meal, and the top layer is covered with moss. This structure can make the fertilizer effect last for 8-10 months.
Three, classic soil mixing scheme practice
3.1 Economic formula
Decayed leaf soil 70% + coarse sand 30%, low cost and good water retention. Suitable for common varieties such as Cymbidium and Cattleya, with a stable pH value between 5.5-6.5.
3.2 Advanced mixed formula
Coconut bran: orchid stone: garden soil = 1:1:2, add 5% bamboo charcoal particles. This formula has strong antibacterial properties and can reduce the incidence of root diseases by 60%.
3.3 Professional formula
Decayed leaf soil 40% + volcanic rock 20% + pine bark 30% + pearl rock 10%. Tests have shown that under this proportion, the annual growth rate of orchid plants increases by 55%, and the flower bud differentiation rate increases by 40%.
Four, key points of maintenance
Regularly measure the EC value of the growing medium (suggest <1.2mS/cm), use a formula with 70% particle content during the rainy season. Supplement slow-release fertilizer granules every spring, and apply foliar topdressing once a month for better results.
Through scientific soil mixing and meticulous management, even beginners can cultivate high-quality orchid plants with strong roots and straight flower spikes. Remember: good growing medium is the first element of successful orchid cultivation.