U-Gro XL 70L Tablet – 5kg Compressed Coco Coir Brick for 70 Liters of Substrate

Stop breaking your back hauling huge, heavy bags of soil up the stairs just to fill a few pots. The U-Gro XL 70L Tablet is a 5kg compressed brick of premium coco coir that, with just a little water, transforms into 70 liters of the perfect medium for your roots, offering superior aeration and drainage compared to traditional peat.

There is a lot of confusion surrounding coco coir cultivation. Many growers hear contradictory opinions: some say it's "only for experts," others claim it dries out too fast, and there are always horror stories about cheap bricks loaded with salts that burn seedlings before they even start. This noise creates a barrier to entry for what is actually one of the most efficient growing methods.

This uncertainty often leads to poor buying decisions—like choosing low-quality, unbuffered coco—or avoiding it altogether and sticking to heavy soil that suffocates roots. The result? You miss out on the explosive growth rates that hydro-style mediums offer, or you end up with nutrient lockouts because you treated coco like soil without understanding its unique needs.

The U-Gro XL 70L Tablet is the definitive solution that clears up the mess. It is a washed, buffered, and stabilized product that guarantees a low EC (salt level) right out of the package. This description is your honest guide to understanding exactly how this brick works, debunking the myths, and showing you how to get professional yields without the headache.

Typical myths about coco coir bricks

• Myth: "Coco coir comes full of sea salt and kills plants."
  Reality: Cheap, low-quality coir might. U-Gro XL is washed with fresh water to guarantee a low EC (
• Myth: "It has no nutrients, so plants will starve immediately."
  Reality: It is an inert medium. This is a feature, not a bug. It gives you total control to feed your plants exactly what they need using cannabis fertilizers, preventing the unpredictability of pre-fertilized soils.
• Myth: "Hydrating the brick is a messy, hours-long nightmare."
  Reality: With the U-Gro XL, you simply place it in a large container, add water, and within minutes it expands to its full volume. No heavy labor required.
• Myth: "You treat it exactly like soil."
  Reality: Coco requires a slightly different watering schedule (it likes to stay moist) and specific nutrients (like extra Calcium and Magnesium), but it rewards you with faster growth.

What U-Gro XL really does (and what it doesn't)

The U-Gro XL Tablet provides a structural sanctuary for your roots. By expanding into 70 liters of high-porosity medium, it ensures that your plants have constant access to oxygen, even when wet. This high air-to-water ratio prevents the dreaded "overwatering" issues common in dense soils and promotes a massive, fuzzy root system. It acts as a blank canvas, holding water (up to 910% retention) while letting excess drain away instantly.

However, it is important to understand what it is not. It is not a "just add water and ignore" super-soil. It contains no NPK nutrients. If you plant a seed in this and give it only plain water for weeks, it will not grow. It requires you to be the chef, providing the nutrients in your irrigation water. This puts the power in your hands, but it also requires a bit more attention than a pre-fertilized soil mix.

Advantages and benefits when used properly

• Logistical Freedom: You are carrying a 5kg brick that fits in a backpack, not a 70L sack that weighs a ton. It is the ultimate solution for discreet urban growers.
• Explosive Root Growth: The texture of hydrated U-Gro allows roots to penetrate easily and breathe, leading to faster vegetative growth compared to soil for cannabis.
• Total pH Control: With a stable pH of around 6, it sits in the sweet spot for nutrient uptake, reducing the risk of deficiencies if you monitor your input water.
• Sustainability: Coco is a byproduct of the coconut industry, making it an eco-friendly, peat-free alternative that doesn't deplete natural bogs.
• Pathogen Resistance: Quality coco like U-Gro is naturally resistant to rot and fungi, providing a cleaner environment for the root zone.

Tips to choose well according to your expectations

If you are a grower who values convenience above all else and wants to water with plain tap water for a month, this product is not for you (look for a heavy, pre-fertilized soil mix instead). The U-Gro XL is designed for the grower who wants to maximize yield and quality by controlling the diet of their plants.

• If you expect fast growth, pair this with a mineral fertilizer line and check pH daily.
• If you want organic results, you can mix this with worm castings and dry amendments to create your own "super soil."
• If you live in a small apartment, this is your best friend—store 500 liters of substrate in a closet without taking up space.

Frequently Asked Questions

How much water do I need to hydrate the 70L tablet?

You typically need about 18 to 25 liters of water to fully hydrate the 5kg brick. It's best to use water with a corrected pH (around 6.0) and perhaps a light dose of root stimulator or BioBizz Calmag to buffer the coco perfectly before planting.

Can I reuse the coco coir after harvest?

Yes, unlike peat, coco maintains its structure well. You can reuse it if you remove the old roots and flush it with enzymes to break down dead organic matter, though for maximum hygiene, many growers prefer to start fresh each cycle.

Do I need to mix perlite with U-Gro XL?

U-Gro XL has excellent natural drainage, but many growers still like to add 10-20% perlite to make the mix even airier, especially if they plan to water very frequently (high-frequency fertigation).

Personal Experience of Pevgrow’s CEO (Alan)

I've heard so many people say they are scared to switch to coco because they think it's "too technical." They see a compressed brick and think it's going to be a hassle. But honestly, once you try U-Gro XL, you realize the logistics alone are worth the switch. I remember dragging 50L bags of soil up three flights of stairs—never again. With these tablets, I can stock up for a whole year's worth of growing in a single shelf.

In practice, what I love about U-Gro is the consistency. I've opened cheap bricks from other brands that smelled like the ocean (salt!) and threw my pH meters off the charts. U-Gro is boringly reliable, which is exactly what you want. You hydrate it, it fluffs up, and your plants take off. Just remember to add CalMag, as coco tends to hold onto calcium, and you'll see growth rates that soil just can't match.