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Biotabs Silicum Flash 1.25kg
Biotabs Silicum Flash 1.25 kg is a fast-acting organic soil improver based on insect frass with an NPK ratio of 4-3-3, enriched with immediately available silicon, calcium, magnesium and chitin. This dry powder replaces liquid growth and flowering nutrients and requires only a single application during substrate preparation. Nutrients are immediately available to plants with residual slow release over a two-month period. Mix 50 grams per 10 litres of substrate or apply 25 grams as topdressing for nutrient deficiency treatment. Silicon strengthens cell structure and increases resistance to heat, drought, pests and pathogens. Contains near-zero heavy metals. Order this innovative organic plant nutrition.
Biotabs Silicum Flash 1.25 kg — fast-release silicon-rich organic soil improver NPK 4-3-3
Silicon is the most underutilised element in organic plant nutrition. It reinforces cell walls, increases resistance to thermal and drought stress, enhances pathogen defence, and improves the uptake efficiency of all other nutrients. Yet it is absent from most organic fertiliser formulations. Biotabs Silicum Flash addresses this gap with an innovative formulation based on insect frass — a sustainable, plant-derived nutrient source that delivers silicon, nitrogen, phosphorus and potassium in immediately available forms. The 1.25 kg format is the standard size in the Biotabs product line.
Insect frass: next-generation organic input
Silicum Flash is formulated primarily from insect-derived organic matter of vegetal origin. The production process uses no antibiotics or hormones, and the feed source is monitored for heavy metals, pesticides and herbicides. The resulting product contains near-zero heavy metal levels — a significant advantage over many competing soil amendments. Production is low-emission and requires minimal water input, making it one of the most sustainable organic fertiliser bases available.
Dual-phase nutrient delivery
Silicum Flash's defining characteristic is its two-phase release mechanism:
- Immediate availability — the majority of nutrients (NPK 4-3-3 plus silicon, calcium, magnesium) are instantly accessible to plants, producing lush green growth from day one
- Extended release — residual nutrients release progressively over two months, maintaining substrate fertility without additional inputs
- Chitin content — triggers plant immune responses and stimulates beneficial soil microorganism activity
- Liquid nutrient replacement — Silicum Flash can replace liquid growth and flowering fertilisers as part of the Biotabs 'just add water' method
Application rates and methods
Mix 50 grams (80 ml) per 10 litres of substrate when preparing soil or coco. For topdressing nutrient-deficient plants: make a small hole near the stem, add 25 grams, cover with soil and water with a solution of 2 grams Bactrex per litre. For mother plants: mix 100 grams per plant and repeat every two months.
The 1.25 kg pack treats 250 litres of substrate at standard rates. Combine with Startrex and Mycotrex for a fully activated biological substrate.
Biotabs Silicum Flash is certified 100% organic by Control Union. Order from Plant&Flower for fast delivery across Belgium.
How much Silicum Flash per litre of substrate?
Mix 50 grams (80 ml) per 10 litres of substrate, equating to 5 grams per litre. The 1.25 kg pack treats 250 litres of soil or coco.
Does Silicum Flash replace liquid Biotabs fertilisers?
Silicum Flash can replace liquid growth and flowering fertilisers such as Orcatrex as part of the Biotabs 'just add water' method. Nutrients are immediately available with residual release over two months, eliminating the need for additional liquid feeding.
What is the difference between Silicum Flash and Startrex?
Startrex is a soil conditioner based on probiotic bacteria, fulvic acid and silicon (NPK 3-1-2). Silicum Flash is a fast-acting fertiliser based on insect frass with a higher NPK (4-3-3) and immediately available silicon. The two products are complementary and can be used together.
Can Silicum Flash be applied to plants already in their containers?
For established plants, apply 25 grams as topdressing by making a small hole near the stem, adding the product, covering with soil and watering with Bactrex solution. This method is also effective for treating nutrient deficiencies mid-cycle.
