Plagron Cocos Perlite 70/30 50L — Buffered Coco Perlite Mix for Superior Aeration
Best for: Growers running automated irrigation or drain-to-waste systems who want ready-to-use media without the hassle of rinsing
Our thoughts
This is a genuinely clever blend. The 70/30 split gives you all the nutrient control of coco with noticeably better drainage and aeration than pure coco alone. Plagron's buffering is properly solid — you're getting a low EC, pH-stable medium that's ready to go straight out of the bag. One for growers who want simplicity without compromise.
Plagron Cocos Perlite 70/30 is a pre-blended growing substrate combining 70% RHP-certified coconut coir with 30% expanded perlite. It's designed to give you the best of both worlds: the nutrient control and water-holding capacity of coco, plus the aeration and drainage punch that perlite brings. No rinsing required. Straight into pots or systems and you're away.
How it compares
This sits in the premium-value segment of coco-based media for indoor growing.
- Superior buffering compared to standard coco blends — more flushed, lower EC out of the bag
- Better drainage and aeration than pure coco, especially useful for aggressive feeding schedules
- Ready-to-use convenience — no pre-rinsing unlike some competitors
- Pure blend approach (no pre-mixed biologicals) gives you full control over amendments
- RHP certified for quality and consistency across bags
Usage guidance
The perlite content means this blend dries faster and stays airier than pure coco. That changes how you approach watering:
Hand watering
Works cleanly in pots. The perlite keeps the rootzone looser, so you can feed a bit more aggressively without worrying as much about compaction. Still let it dry to roughly half weight between waterings.
Drip and automated systems
This is where this blend really shines. The enhanced drainage means you can run drain-to-waste setups with more confidence. Faster drying cycles mean you can pump nutrient uptake without the waterlogging risk of pure coco.
Flood and drain
The aeration is excellent here — perlite drains quickly, letting roots breathe between flood cycles.
Nutrients
Use a coco-specific feed. Plagron recommends their Cocos A&B, but any quality coco nutrient will work. The blend gives you full control — you're not dealing with any pre-loaded amendments.
Technical specifications
- Volume: 50 litres per bag
- Composition: 70% coconut coir, 30% expanded perlite
- pH: 6.3–7.7 (EN13037)
- EC: 0.06–0.09 mS/cm (1:1.5)
- Certification: RHP certified
- Buffering: Enhanced — salt-flushed and stabilised
- Bag dimensions: 60cm L × 40cm W × 14cm H
- Rinsing required: No — ready to use
- Reusable: Yes
Who this is for
- Growers running drip irrigation, flood and drain, or automated watering systems
- Anyone practising drain-to-waste cultivation wanting faster cycle times
- Experienced coco growers who want better aeration than pure coco offers
- Growers managing their own nutrient programs (not needing pre-mixed amendments)
- Those who value time — no rinsing, straight to use
Our take
This is a well-engineered blend that solves a real problem: pure coco is nutrient-rich and controllable, but it can get dense and waterlog. Add 30% perlite and suddenly you've got aeration, faster drying, and better rootzone oxygen without losing the coco benefits. The buffering is solid, the EC is low, and it's RHP certified — you're not gambling.
Good time to pick up a 50L bag while clearance stock lasts, especially if you're running any kind of automated system. Does exactly what it should, and you'll notice the difference within a week.
