Pro-Mix Organic Vegetable & Herb Mix - 9 Litre

Canadian sphagnum peat moss is important because it holds moisture evenly while still supporting air spaces that roots need for oxygen, which makes watering and nutrient uptake more consistent. It is unique because it naturally trends acidic and acts more like a moisture-and-structure foundation than a nutrient source, so it changes root-zone balance in ways other base ingredients do not.

Coconut coir is important because it holds water while still keeping roots oxygenated, creating a more stable root zone that supports faster, healthier growth, and it’s unique compared to similar media because it combines soil-like moisture buffering with more controllable, predictable nutrient and drainage behavior.

Compost supports plant growth by building a healthier root zone, improving water retention and drainage at the same time, and helping nutrients stay available in a steadier, more buffered way. It’s unique because it’s a finished, stabilized organic material that works mainly by improving soil structure and biology, not by delivering a fast “spike” like many other organic inputs.

Perlite is important because it increases root-zone oxygen and improves drainage, helping roots stay healthy and active; it’s unique because its main benefit is physical structure and airflow—not nutrients or moisture storage—so it fixes “too wet and compact” root problems in a simple, predictable way.

Gypsum is important because it supplies calcium and sulfur while improving soil structure, helping roots breathe and water soak in more evenly, and it is unique because it does this without significantly raising soil pH like lime-based calcium sources.

Yes, when soil is too acidic, limestone can help plants grow better by gently raising pH and supplying calcium so roots can absorb nutrients more smoothly. It’s unique because it fixes the root-zone chemistry itself, which can solve several “mystery deficiencies” at once, but if used when pH is already high it can trigger micronutrient lockout instead.

Mycorrhizae form a living partnership with roots that expands the plant’s effective root reach, helping it gather water and hard-to-reach nutrients more efficiently. They’re important because they improve steadiness and stress tolerance over time, and they’re unique because they physically connect to roots and build a fungal network in the root zone rather than acting like a direct nutrient input.

Organic-based fertilizer is slower because its nutrients are released as the root zone breaks down organic particles over time, so it feeds plants through steady biological conversion rather than instant availability, which is what makes it uniquely good at supporting long-term root health and stability.

Peat humus acts like a sponge and a gentle nutrient holder in the root zone, smoothing moisture and nutrient availability so roots can feed more consistently. It’s important because many “deficiency” symptoms come from unstable water and nutrient swings, and it’s unique because it improves the root environment rather than providing a fast nutrient hit.