Product Type
Calcium and magnesium silicate fertilizer
SIL-CA Mg
Calcium-magnesium silicate fertilizer for stronger tissues, calcium nutrition, photosynthetic support, stress resilience, fruit quality and yield.
SIL-CA Mg is a calcium and magnesium silicate fertilizer designed as a source of silicon, calcium and magnesium for crop nutrition programmes. The source positions it for prevention and correction of calcium-related nutritional problems and for supporting magnesium-dependent photosynthetic activity.
Regular foliar use is associated in the document with stronger plant tissues, improved vegetative growth and higher harvest yield. The silicon fraction is also linked with greater mechanical stability, nutrient uptake, environmental-stress tolerance and post-harvest performance.
Technical Profile
Key product information at a glance.
Formulation
Liquid calcium-magnesium silicate fertilizer
Origin
Imported from EU
Key Composition
27% SiO₂ · 23.5% CaO · 8.25% MgO · Density 1.50 · pH 5-6
Application
Foliar spray · Soil application
Available Pack Sizes
1 L · 5 L · 10 L · 20 L · 1000 L
Composition and guaranteed analysis
| Composition | % w/v |
|---|---|
| Silicon (SiO₂) | 27.00 |
| Calcium (CaO) | 23.50 |
| Magnesium (MgO) | 8.25 |
Key benefits and agronomic effects
- Supports prevention and correction of calcium deficiency.
- Helps reduce calcium-related disorders including apical necrosis, fruit cracking and early maturation, as stated in the source.
- Supports magnesium-related photosynthetic activity.
- Improves mechanical stability and helps reduce lodging.
- Supports uptake of nitrogen, phosphorus, potassium and micronutrients.
- Supports tolerance to drought, heat and salinity stress.
- Supports vegetative growth, harvest yield and post-harvest performance.
How it works / Technical advantages
SIL-CA Mg combines silicon, calcium and magnesium in a liquid silicate fertilizer. The source describes silicon deposition in epidermal tissues as increasing mechanical stability and creating a physical barrier that supports resistance to pathogens and insects.
The document also links silicon nutrition with stronger stems and more erect leaves, improved light capture, better uptake of N, P, K and micronutrients, lower transpiration under drought and heat, reduced sodium uptake under salinity and moderated uptake of certain heavy metals.
Application rates and timing
Application Guidance: Use the crop-specific foliar programmes below. The supplied datasheet identifies SIL-CA Mg for Soil/Foliar use, but it does not provide a separate soil application rate, so no soil dose is inferred.
Foliar application
| Crops | Timing | Dose | Notes |
|---|---|---|---|
| Horticultural crops | Start 15 days after transplanting | 300-400 cc/100 L | Apply 3-4 times at 2-week intervals. |
| Grapevine and kiwi | From 20 cm buds | 200-300 cc/100 L | Repeat every 15 days, with a minimum of 3 applications. Timing wording reproduced from the source. |
| Pome and stone fruit | From newly formed fruits until colour change | 200-300 cc/100 L | |
| Pome fruits | Start on newly formed fruits | 250-350 cc/100 L | Apply at 15-day intervals. |
| Citrics | During bud growth in spring and fall | 300 cc/100 L | Crop terminology reproduced from the source. |
| Berries | From budding until harvest | 200-300 cc/100 L | Apply at 15-day intervals. |
| Potato | Start 30 days after emergence | 300-400 cc/100 L | The source links this timing with improved photosynthetic activity. |
Additional technical information
Target problem / deficiency symptoms
SIL-CA Mg is intended for calcium and magnesium nutrition where crops show or risk calcium-related disorders, reduced photosynthetic activity or insufficient tissue strength. The source specifically mentions apical necrosis, fruit cracking, early maturation and reduced photosynthetic activity associated with calcium or magnesium deficiency.
Precautions & storage
Avoid contact with eyes, food or drinks. Keep out of reach of children. If swallowed, seek medical advice. Do not store in direct sunlight. Store between 5 °C and 35 °C. Shake before use.
Frequently asked questions
What is SIL-CA Mg?
SIL-CA Mg is a calcium and magnesium silicate fertilizer that supplies silicon, calcium and magnesium for crop nutrition programmes.
What is the composition of SIL-CA Mg?
It contains 27% silicon as SiO₂, 23.5% calcium as CaO and 8.25% magnesium as MgO on a % w/v basis. The source also gives a density of 1.50 and pH 5-6.
What is SIL-CA Mg used for?
It is used to support calcium and magnesium nutrition, strengthen plant tissues, support photosynthesis and improve crop resilience and yield.
Can SIL-CA Mg help reduce fruit cracking?
Yes. The source lists fruit cracking among the calcium-deficiency effects that regular foliar application is intended to help prevent.
Why does SIL-CA Mg contain magnesium?
The source links magnesium deficiency with reduced photosynthetic activity, so magnesium is included to support this aspect of crop nutrition.
Does SIL-CA Mg contain boron?
The descriptive text mentions calcium deficiencies aggravated by slight magnesium and boron deficiencies, but the composition table does not quantify boron. Boron is therefore not listed as a declared composition component here.
How does silicon support plant structure?
The source states that silicon accumulates in epidermal tissues, increasing mechanical stability and helping reduce lodging.
Can SIL-CA Mg support crops under drought, heat or salinity?
Yes. The source links silicon with reduced transpiration under drought and heat and reduced sodium uptake under salinity.
What is the foliar dose for horticultural crops?
Apply 300-400 cc/100 L, starting 15 days after transplanting, in 3-4 applications at two-week intervals.
What is the dose for grapevine and kiwi?
Apply 200-300 cc/100 L from the stage described in the source as ’20 cm buds’, repeating every 15 days for at least three applications.
What is the dose for pome and stone fruit?
Apply 200-300 cc/100 L from newly formed fruits until colour change.
How should SIL-CA Mg be stored?
Store away from direct sunlight between 5 °C and 35 °C and keep out of reach of children.
What pack sizes are available?
SIL-CA Mg is available in 1 L, 5 L, 10 L, 20 L and 1000 L formats.
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