UGRO Small Rhiza 11L – Compressed Coco Brick with Mycorrhizae for Explosive Roots

UGRO Small Rhiza 11L is the ultimate solution for growers who want to stop hauling heavy bags of soil and start growing with professional precision. This compressed brick of high-quality coco coir is enriched with endomycorrhizae, offering you a lightweight, discreet, and incredibly effective medium that guarantees a massive root system and vigorous growth from day one.

Why is your current substrate holding you back?

Many growers, especially when starting out, struggle with heavy, inconsistent soils that compact easily, suffocating the roots. You might have experienced the frustration of buying cheap substrate only to find it full of pests, or worse, dealing with plants that just refuse to grow because the medium retains too much water or has a wild pH level. It’s a headache that wastes your time, money, and potential harvest.

There is nothing worse than investing in top-tier genetics and expensive lights, only to watch your plants stall because their "feet" are unhappy. Without a proper root system, your plants can't eat, and if they can't eat, they don't yield. Sticking to low-quality mediums is like trying to run a marathon in concrete shoes—you are limiting your success before you even germinate the seed.

UGRO Small Rhiza 11L solves all these issues in one go. By switching to this premium coco coir, you get a fluffy, aerated medium that makes root rot nearly impossible. Plus, the added mycorrhizae create a symbiotic relationship with your roots, acting as a secondary stomach that devours nutrients. It’s the perfect base to use with your favorite Cannabis fertilizers, giving you total control and explosive results.

If you’re just starting out: how this brick saves your grow

Coco coir can seem intimidating if you are used to soil, but UGRO makes it incredibly easy. This brick is washed, buffered, and stable, meaning you don't have to be a chemist to use it. It provides a safety net against overwatering—a common rookie mistake—because it drains excess water instantly while keeping the perfect moisture ratio.

• Impossible to overwater: The structure holds oxygen even when wet, saving your plants from root rot.
• Easy to handle: Forget dragging 50L bags up the stairs; this brick fits in a backpack and expands when you need it.
• Pre-buffered quality: It comes with a stable pH (5.5-6.5) and low EC, so you start with a clean slate.
• Built-in root boosters: The mycorrhizae work for you, helping young plants establish faster without you doing anything extra.

If you already have experience: why it deserves a place in your kit

For the veteran grower, UGRO Small Rhiza offers the precision of hydroponics with the simplicity of a hand-watered pot. You know that the root zone is the engine of the plant, and the endomycorrhizae in this block increase the root mass significantly. This allows for heavier feeding schedules and higher EC tolerance during flowering.

• Total nutrient control: Since it's an inert medium, you decide exactly what the plant eats and when.
• Logistical efficiency: Store hundreds of liters of substrate in a small cupboard. Perfect for maximizing space.
• Consistent metrics: Every batch is identical, ensuring your runoff pH and EC readings are reliable crop after crop.
• Enhanced uptake: The fungal network extends the root reach, accessing micropores that regular roots can't reach.

Advantages and benefits for any level

• Explosive Root Growth: Thanks to the natural symbiosis with mycorrhizae.
• Discretion & Stealth: A small brick is much easier to bring home unnoticed than a giant bag of soil.
• Sustainability: Made from peat-free, renewable coconut husks.
• Versatility: Works perfectly in Black Pots or slab systems.
• Pathogen Free: Sterilized and clean, preventing soil-borne pests like fungus gnats.
• Water Efficiency: Retains moisture well while allowing aggressive drainage.

Typical mistakes this product helps you avoid

Using the wrong medium is the number one cause of failure. UGRO Small Rhiza is designed to minimize human error and environmental stress.

• Suffocating roots: Prevents compaction, ensuring roots always have access to oxygen.
• Nutrient lockout: Being buffered and washed means you won't fight against salt buildup from day one.
• Pest infestations: Unlike cheap soil stored outdoors, this dehydrated brick is free from insect eggs and larvae.
• Inconsistent growth: The uniform texture ensures all plants in your crop dry out at the same rate.

Frequently Asked Questions

How do I prepare the UGRO Small Rhiza 11L brick?

It's super simple. Place the brick in a large container and add about 3 liters of fresh water (preferably with a pH of 6.0). Wait a few minutes for it to absorb the water and expand, then fluff it up with your hands. You now have 11 liters of high-quality substrate ready to use.

Do I need to add nutrients from the beginning?

Yes. Coco coir is an inert substrate, meaning it has no nutritional value on its own. You should start feeding with a light dose of grow fertilizer from the very first watering after the seeds have germinated.

Can I mix this with other substrates?

Absolutely. Many growers mix it with perlite for even more drainage, or mix it into soil to improve aeration. However, to get the full benefit of the mycorrhizae and precision feeding, using it pure is often the best route.

Is it better than the Plagron Coco?

Both are excellent. UGRO is famous for its "Rhiza" (mycorrhizae) content included in the block. If you prefer a loose, pre-bagged option, you might look at Premium Coco Substrate Pre-Fertilized Plagron, but for storage and transport, the UGRO brick wins.

Personal Experience of Pevgrow’s CEO (Alan)

I honestly love these bricks for their logistics. When I have to set up a grow in a place where I can't be seen hauling huge bags of dirt, UGRO is a lifesaver. I can fit 50 liters worth of substrate in a standard backpack!

For beginners, I always recommend this specific "Rhiza" version. The added fungi act like an insurance policy for your roots. I've noticed that clones root faster and transplant shock is almost non-existent. Just remember: treat it like hydro, check your pH, and the growth speed will blow your mind compared to soil.