Plagron Cocos Premium 50L — Ready-to-Use Buffered Coco Substrate
Best for: Growers wanting a clean, inert coco medium that's ready to use straight out of the bag
Our thoughts
Plagron Cocos Premium is properly buffered coco done right. It arrives ready to go — no rinsing, no faffing about. The double-buffering process means a guaranteed low EC, which translates to consistent nutrient uptake from day one. One we see a lot of growers picking up when they want quality without the premium price tag.
Plagron Cocos Premium is a 50-litre ready-to-use coco substrate — a clean, inert growing medium made from buffered coco peat and coco fibres. It arrives pre-rinsed and pH-stable, which means you can start potting and feeding immediately. No pre-treatment needed. This is soilless growing medium designed for fast-growing plants, with the water retention and aeration you need for controlled, predictable results.
How it compares
Plagron Cocos Premium sits in the quality-assured tier of ready-to-use coco substrates.
- Double-buffered through Plagron's Netherlands facility — more thoroughly rinsed than standard coco
- Guaranteed maximum EC of 0.14 mS/cm — among the lowest salt levels available
- Includes Trichoderma for root health protection against harmful moulds
- RHP certified — third-party quality verification
- Significantly cleaner than unbuffered coco; more stable than rockwool alternatives
In straightforward terms: you're getting premium-grade buffering without the premium-grade price.
Usage guidance
Plagron Cocos Premium works as an inert medium with no nutrients, so you're in full control from the start.
Immediate potting
Start potting your plants straight away. No soaking, no pre-rinsing. Begin feeding with nutrient solution from day one.
Nutrient pairing
Plagron Cocos A&B is the matched nutrient set designed specifically for this substrate. Coco binds calcium and magnesium differently to soil, so a coco-specific feed is essential — standard nutrients won't cut it.
Watering and drainage
Cocos Premium acts like a sponge — excellent water retention combined with aeration. This balance makes irrigation easier to optimise. It works cleanly in hand-watering, drip systems, and run-to-waste setups.
Reuse
You can reuse it as a soil improver. Best practice: refresh the substrate after six months of growing.
Technical specifications
- Volume: 50 litres per bag
- Composition: Buffered coco peat and buffered coco fibres blend
- pH: 6.1–7.4
- EC: 0.09–0.14 mS/cm (guaranteed maximum)
- Additives: Trichoderma (beneficial fungi)
- Nutrients: None (inert medium)
- Certification: RHP certified
- Dimensions: 65cm (L) × 41cm (W) × 14cm (H)
- Ready to use: Yes — pre-rinsed and buffered
Who this is for
- Growers who want ready-to-use convenience without compromise on quality
- Anyone running multiple systems where consistency matters
- Coco users looking for guaranteed low salt levels and pH stability
- Growers pairing with Plagron Cocos A&B nutrient systems
- Commercial and hobby growers after a predictable, certified substrate
Particularly well suited to controlled environment growing where repeatability and quality assurance are non-negotiable.
Our take
This is proper buffered coco substrate with the quality verification to back it up. Double-buffering means genuinely low salt levels, the Trichoderma gives your roots a helping hand, and the pH stability cuts out one of the main variables in inert growing. You're not paying for a brand — you're paying for a process that actually works.
Good time to buy while stock lasts. Does exactly what it should, day in, day out.
