BioBizz All-Mix Peat-Free 50 Litre - Ready-Fed Organic Growing Medium
Best for: Soil growers who want a pre-fertilised, sustainable growing medium that needs little to no extra feed early on.
Our thoughts
All-Mix has been a go-to organic soil for years because it does a lot of the early feeding for you. This peat-free version keeps that same reputation while dropping peat from the mix, which matters more each year as peat becomes harder to source sustainably.
BioBizz All-Mix Peat-Free replaces the peat in the original All-Mix formula with composted bark, coconut coir, perlite, miscanthus and other renewable materials, while keeping the same heavily pre-fertilised approach the range is known for. It's designed to emulate rich, biologically active outdoor soil, with enough built-in nutrition to sustain healthy growth for the first couple of weeks without needing additional feed.
Because it's pre-loaded with organic matter and a live microbial ecosystem, BioBizz recommends watering it in and leaving it to stand for around 36 hours before planting, giving the nutrients and microorganisms inside time to start working. After that early window, it pairs naturally with BioBizz's Bio-Grow and Bio-Bloom feeds as the plant's own nutrient reserves get used up.
How it compares
All-Mix Peat-Free sits alongside a small but growing group of peat-free options in a category still dominated by peat-based mixes.
- Canna Terra Professional is a widely used peat-based alternative with a similar pre-fertilised approach, but doesn't offer a peat-free version with the same track record.
- Plagron's Batmix is another organic, richly fed soil aimed at the same market, generally peat-based rather than peat-free.
- Compared with BioBizz's original (peat-based) All-Mix, this peat-free version uses different bulking materials but is built to deliver a similar early-growth nutrient charge.
If sustainability matters to your buying decision as much as performance, this is one of the more established peat-free organic soils on the market.
Usage guidance
Treat it as a ready-fed medium, not an empty growing base.
First use
Water the bag thoroughly and leave it to stand for around 36 hours before planting, so the microbial activity inside gets going before roots arrive.
Early growth
Hold off on additional feed for the first one to two weeks - the medium's built-in nutrition is usually enough on its own during this period.
Ongoing feeding
Introduce Bio-Grow during vegetative growth and switch to Bio-Bloom (plus Top-Max if used) once flowering begins, as the soil's own nutrient charge tails off.
Watering
Water thoroughly but allow the top layer to dry slightly between waterings to keep the medium's biology healthy and avoid waterlogging.
Technical specifications
- Volume: 50 litres
- Base materials: Composted bark, coconut coir, perlite, miscanthus
- Peat content: None (peat-free formulation)
- Pre-fertilised: Yes - built-in nutrient charge for early growth
- Suitable for: Soil and coco-style container growing
- Recommended prep: Water in and rest for approx. 36 hours before planting
Who this is for
- Organic growers who want a low-maintenance, pre-fed soil
- Growers looking to move away from peat-based media on sustainability grounds
- New growers who'd rather not manage a full feed schedule from day one
- Container growers running one plant per bag through a full cycle
Best suited to soil growers doing a full grow from young plant to harvest in one medium.
Our take
A genuinely useful update to a proven soil - same pre-fed philosophy, less reliance on peat. It does a lot of the early nutrient work for you, which is exactly what a new or time-poor grower wants from a growing medium.
Does exactly what it should, day in, day out.
