Description
SkyHigh Coco Prime 70/30 is a premium blended growing medium combining 70% washed and buffered coco coir with 30% perlite in a single, ready-to-use bag. This blend is engineered to deliver the optimum balance between water retention and drainage that professional coco growers target — offering more air-filled porosity than straight coco while maintaining the moisture-holding capacity that sustains roots between irrigation cycles.
Why the 70/30 Coco-Perlite Blend Outperforms Straight Coco
Straight coco coir is an excellent growing medium, but it holds water too well for some growing styles and certain environmental conditions. In cooler UK grow rooms, or when watering frequency is restricted, straight coco can stay saturated for extended periods — reducing oxygen in the root zone and slowing growth. Adding perlite — the volcanic glass aggregate that creates permanent air pockets — solves this problem without sacrificing the beneficial water retention of coco. The 70/30 ratio is the industry-standard blend, widely recommended by nutrient manufacturers and professional growers alike. It gives you the familiar nutrient-neutral base of coco coir with an improved drainage profile that encourages roots to develop aggressively in search of moisture — leading to larger, more vigorous root systems and better above-ground performance. We have been using and recommending coco-perlite blends at The Horticulture Company since 2017. The 70/30 ratio is consistently where results are best across a range of growing styles and environments.
SkyHigh Quality Standards and Nutrient Compatibility
SkyHigh Coco Prime is washed to remove excess sodium and potassium, then buffered with calcium and magnesium to stabilise the ion exchange sites in the coco fibres. This preparation means the medium will not strip calcium and magnesium from your nutrient solution in the early stages of growing — a common problem with cheaper, unprocessed coco products that can produce deficiency symptoms even when nutrient concentrations appear correct. The perlite fraction is clean, graded horticultural perlite, mixed evenly throughout the coco rather than added in layers — ensuring every pot filled from this bag contains the correct ratio throughout its depth. SkyHigh Coco Prime 70/30 is fully compatible with all coco-specific nutrient lines including Canna Coco A&B, Plagron Coco A&B, Growth Technology Ionic Coco, and Shogun Coco. Pre-charge with a CalMag supplement before first use to maximise performance from the very first watering.







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