-By Yang
Kiryu Sand
About Kiryu Sand
The Kiryu Bonsai/Succulent Sand (also known as Kiryuzuna) was originated from Kiryū (in Japanese: 桐生市／きりゅうし Kiryū shi ), it is a city located in Gunma Prefecture, Japan.
Kiryu Sand is another product of volcanic activity but with greater density than Akadama Soil and Kanuma Soil. (Hardness somewhere between pumice and lava) Therefore, instead of “soil”, Kiryu translates to “River Sand” in Japanese.
Kiryu Sand is a hard porous grit, it holds structure well and will not break down easily, it is particularly useful when repotting Succulents that remain in their pots for long periods.
Kiryu Sand is a mineral rich medium (high iron content [Fe2O3 (iron oxide)] ) and considered as being pH slightly acid(pH that oscillates between 6.5 and 6.8). Due to the slow-release process of nutrients, with an optimal supply of microelements Succulents are evenly supplied over a long period of time. There is hardly any overfertilization or salinisation, therefore, ‘Kiryu Sand’ also called ‘Kiryu Fertilizer’ in some places.
Usage of Kiryu Sand
Use as Soil Mix
It can be mixed in as an amendment to other soil substrates such as Kanuma, Akadama, Perlite, Pumice, Lava Rock, Coco Coir, Bark, etc.
Use as Topping
In the areas where the wind is relatively strong, it can also be used as top dressing.
Features
Kiryu Sand
Pre-washed Kiryu Sand
Visual Indicator
It changes colour (it darkens) when moist which provides a VISUAL INDICATOR of when to water your plant.
Echeveria Nicksana Variegated Topping with Kiryu
Structurally Stable Substrate
It is a very structurally stable gravelly granule, relatively hard in the particles, has low tendency to soil compaction and will not break easily.
Succulent Soil Mix
Excellent Drainage
Combined with ability to drain excess water, Succulent roots can enjoy better aeration for healthy root growth.
C309 Lithop Gracilideneata'Cafe au Lait' Topping with Kiryu
Excellent Drainage Properties
Has high water permeability, holds less water than standard pumice. This limited moisture-holding capacity helps the roots to absorb the needed quantity of water without having to sit in a waterlogged condition for hours straight.
Tips
Kiryu needs to be washed before use to avoid dust and smaller pieces.
Depending on the size and vitality of the plant, the substrate must be changed after several years (usually after about 3 years).
