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Two bags of Biobizz Light-Mix — 40L of premium organic soil for indoor LED grows. — Lightly pre-fertilized for ~3 weeks, airy and free-draining: the ideal start for cuttings, seedlings and young plants.
Confidence: hand-picked by BloomLED, designed in France, LED horticulture experts for 10+ years.
2 × 20L (40L total) · Light pre-fert · 100% organic · Ideal under indoor LEDs
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Biobizz Light-Mix is the go-to substrate for serious indoor growers. This 2-pack gives you 40 litres of an airy, free-draining and lightly pre-fertilized soil — exactly what cuttings, seedlings and young plants need under a horticultural LED lamp. A 100% organic blend of light peat, perlite and organic fertilizers, formulated for intensive grow tent cultivation where root aeration and fast drainage make all the difference.

| Specification | Value |
|---|---|
| Brand | Biobizz |
| Total volume | 2 × 20 L = 40 L |
| Composition | Light peat, perlite, organic fertilizers |
| Pre-fertilization | Light, ~2 to 3 weeks |
| Stable pH | ~6.2 |
| Use | Cuttings, seedlings, young plants, indoor repotting |
| Compatible | Biobizz, BioCanna and T.A. Pro Organic nutrients |
The Light-Mix's gentle pre-fertilization carries cuttings and young plants without burning roots. The most versatile base to kick off a grow under LED — especially in a mini grow tent or propagator.
Built-in perlite prevents compaction and boosts root oxygenation — critical under a horticultural LED lamp where substrate moisture must stay in control to avoid root rot and disease.
Biobizz Light-Mix complies with organic farming standards. No synthetic chemistry: you grow clean, for yourself and for your plants.
40 L packaged as 2 × 20 L bags, delivered straight to your door. Easier to handle than a single big bag, more affordable than buying single units — the right amount for a full 60×60 or 80×80 grow cycle.
40 L is enough to fill 4 to 6 pots of 7 L (the classic size for a 60×60). With 11 L pots, plan on 3 to 4 pots — the 2-pack is sized for a full grow cycle.
Do I need to add fertilizer with Light-Mix?The pre-fertilization lasts 2 to 3 weeks after potting. Beyond that, you'll need to add a grow then bloom nutrient — the Biobizz Bio·Grow / Bio·Bloom range is the most consistent fit, but T.A. Pro Organic or BioCanna also work very well.
Can this soil be used for cuttings?Yes — Light-Mix is one of the best substrates for soil cuttings thanks to its airy structure and very light pre-fertilization. Pair it with a propagation LED bar like SpectraLINE for an optimal strike rate.
Selected by the BloomLED team among the most-used substrates by our indoor growers — a classic, proven across thousands of grow cycles under LED.