Root-Juice by BioBizz — organic humic acid and seaweed root stimulant, 1L bottle
Root-Juice by BioBizz — organic humic acid and seaweed root stimulant, 500ml bottle
Root-Juice by BioBizz — organic humic acid and seaweed root stimulant, 5L can

Root-Juice by BioBizz — Organic Root Stimulant with Humic Acid & Seaweed

SG-S1980

Regular price$49.95
/
Shipping calculated at checkout.

Organic root stimulant made entirely from vegetable ingredients: premium humic acid and seaweed. 4ml per litre through propagation and veg, 2ml for the first two weeks of flower, in soil, coco or hydro.


Size
  • Handpicked by growers
  • Ships today
  • Real advice, real people
  • 5,000+ high yielding customers
  • 30-day returns*
  • Free shipping over $499*
  • In stock, ready to ship
  • Backordered, shipping soon

Root-Juice is BioBizz's organic root stimulant, made entirely from vegetable ingredients and built on two of them: premium humic acid and seaweed. It is formulated to encourage vigorous root development and to enhance the natural biological life that surrounds and supports the root system, so a young plant is prepared to absorb nutrients quickly. That is the strong, resilient start the rest of the BioBizz schedule builds on, and it is why Root-Juice is the first bottle on the chart and the first one you stop. BioBizz runs it at 4ml per litre through propagation and veg, then 2ml per litre for the first two weeks of flower, in soil, peat and coco mixes, and lists it for supporting roots in hydroponic and aeroponic systems too. Available in 500ml, 1L and 5L.

Vigorous Root DevelopmentSpecially formulated to encourage vigorous root development, both in the initial rooting stage and in plants that have already rooted. Roots first; everything else follows.
Humic Acid And SeaweedTwo natural substances, premium humic acid and seaweed, in a product made entirely from vegetable ingredients and designed for organic gardening.
Enhances Root-Zone BiologyEnhances the natural biological life that surrounds and supports the root system, which is what prepares the plant to take up nutrients quickly.
4ml Per Litre, Propagation And VegThe AU schedule runs 4ml per litre through propagation and veg, then 2ml for flowering weeks 1 and 2 and nothing after. The first week or two in the pot is the window that matters.
Soil, Peat, Coco, HydroIdeal for adding to soil, peat and coco mixes, and listed by BioBizz for supporting the roots in hydroponic and aeroponic systems.
Certified Organic InputEcocert attested, Control Union certified as an organic input under the EU regulation and the US NOP, plus Clean Green and EnvirOganic. Vegan icon on the BioBizz AU schedule.

Specifications

Product: Root-Juice root stimulant by BioBizz
Sizes: 500ml, 1L, 5L (BioBizz also makes 250ml, 10L and 20L)
Composition: Premium humic acid and seaweed; made entirely from vegetable ingredients (BioBizz). Percentages and NPK not published on the 2026 data sheet
Type: Organic root stimulant
Dose rate: 1–4ml per litre of water (BioBizz product page); 4ml per litre on the data sheet and AU schedule
AU schedule, both charts (ml per litre): Propagation 4 · Veg 4 · Flower wk1–2: 2, 2 · not used from flowering week 3 onward
When to use: From the initial rooting stage. BioBizz: feed during the first week(s) because this is the crucial time period for healthy rooting
Substrates: Soil, peat and coco mixes; hydroponic and aeroponic systems. On coco: adjust pH and use an enzyme product (BioBizz)
Application: Regular watering, watering systems and hydroponics, indoor and outdoor (BioBizz). The AU schedule covers coco / light mix and fertilised substrate; there is no hydro column
Makes: At 4ml/L: 500ml makes 125 litres; 1L makes 250 litres; 5L makes 1,250 litres
Certifications: Ecocert attestation; Control Union certified Organic EU Input; Control Union certified NOP (US National Organic Program) Input; Clean Green certification; EnvirOganic certification — as listed by BioBizz for this product
Vegan: Carries the BioBizz vegan icon on the AU nutrient schedule
Barcode (EAN): 500ml 8718403232479 · 1L 8718403231359 · 5L 8718403231397
Safety: Keep out of the reach of children. Do not swallow. Use following the instructions (BioBizz data sheet)
Manufacturer: BioBizz Worldwide Organics (biobizz.com). Distributed in Australia by Stealth Garden

Grower's Tip

  • Front-load it. BioBizz says the first week or weeks are the crucial time period for healthy rooting. 4ml per litre from the first watering in the pot, not after the plant looks like it needs help.
  • It is the first bottle you stop. Root-Juice runs 2ml per litre in flowering weeks 1 and 2, then it is done. Do not keep paying for root stimulant in week 6.
  • Cuttings and seedlings get the full 4ml. Propagation is on the chart at 4ml per litre, the same as veg. At that rate a 500ml bottle is 125 litres of propagation water, which is a lot of cuttings.
  • Feed the biology, then add some. Root-Juice enhances the biological life already around the roots. A mycorrhizal inoculant like Great White at transplant adds the fungal side for it to feed.
  • Coco: pH and an enzyme. BioBizz's coco condition applies here too: adjust pH and use an enzyme product. Cannazym is the usual pick.
  • Hydro and aero: start low. BioBizz lists Root-Juice for hydroponic and aeroponic systems, but there is no hydro column on the AU schedule. In a reservoir, start at the bottom of the 1–4ml range and watch for build-up.
  • Dose by ml, not EC. A humic and seaweed extract barely moves an EC meter. 4ml per litre is 40ml in a 10-litre can; a syringe makes that easy.
  • Shake it. Humic concentrates settle. Shake before every pour and stir the can through.

How To Use It

1Start on day one in the pot. Cuttings, seedlings and fresh transplants all go straight onto Root-Juice. The first week or two is the window BioBizz says matters most.
2Fill the can, pH if you are on coco. BioBizz calls pH adjustment and an enzyme product essential on coco. In soil, fill and go.
3Shake the bottle. Humic concentrate settles. Shake before every pour.
4Measure 4ml per litre. 40ml for a 10-litre can, 200ml for 50 litres. Use a syringe or measuring cup, not the cap.
5Add Bio-Grow to the same can. Bio-Grow runs at 2ml per litre through propagation and veg alongside Root-Juice. Stir everything through.
6Water as the plant needs it, through veg. 4ml per litre every feed until the flip.
7Drop to 2ml for flowering weeks 1–2, then stop. From week 3 of flower Root-Juice is off the chart. Bio-Bloom, Top-Max and the boosters take over.

Pairs Well With

Frequently Asked Questions

What is BioBizz Root-Juice?

Root-Juice is an organic root stimulant made entirely from vegetable ingredients and designed for organic gardening. It combines two natural substances, premium humic acid and seaweed, and is formulated to encourage vigorous root development and enhance the natural biological life around the root system. BioBizz's description is that it helps with the initial rooting stage as well as the growth of plants that have already rooted, so the plant is prepared to absorb nutrients quickly.

What is the Root-Juice dose rate?

BioBizz's product page gives 1–4ml per litre of water; the data sheet and the Australian schedule use 4ml per litre. The AU chart runs 4ml per litre through propagation and veg, 2ml per litre for flowering weeks 1 and 2, and nothing after that. The same numbers apply on coco / light mix and on fertilised substrate.

When do I use Root-Juice, and when do I stop?

From the very start. BioBizz says to feed with Root-Juice during the first week or weeks because that is the crucial time period for healthy rooting. On the AU schedule it runs every feed through propagation and veg, drops to 2ml per litre for the first two weeks of flower, and is finished by week 3 of flower.

Can I use Root-Juice on cuttings and seedlings?

Yes. Propagation is on the BioBizz chart at the full 4ml per litre. Use it from the first watering once the cutting or seedling is in its medium.

Does Root-Juice work in coco, hydroponics and aeroponics?

BioBizz describes it as ideal for adding to soil, peat and coco mixes, and for supporting the roots in hydroponic or aeroponic systems. The coco condition is the standard BioBizz one: adjust pH and use an enzyme product. For hydro and aero there is no column on the Australian schedule, so start at the low end of the 1–4ml range and keep an eye on the reservoir.

Is Root-Juice organic?

BioBizz lists Root-Juice with an Ecocert attestation and Control Union certification as an organic input under both the EU regulation and the US National Organic Program, plus Clean Green and EnvirOganic. Those are overseas input certifications rather than an Australian organic certification. It carries the BioBizz vegan icon on the AU schedule.

How is Root-Juice different from a mycorrhizal inoculant?

Root-Juice feeds and stimulates the biology already around the roots with humic acid and seaweed. An inoculant like Great White adds living fungi and bacteria to the root zone. They do different jobs and run well together: inoculate at transplant, then keep Root-Juice in the feed through veg.

Will Root-Juice change my EC or pH?

Barely, on EC: it is a humic and seaweed extract, not a mineral salt, so an EC meter will not tell you much. Dose by volume. On pH, BioBizz says adjustment is essential on coco; in soil it gives no target.

Why is the 5L so much dearer than the feeds?

Root-Juice is the concentrated stimulant in the range, not a base fertiliser, and it is priced that way everywhere BioBizz is sold. The flip side is that it runs for propagation, veg and two weeks of flower only, so a 500ml bottle at 4ml per litre is 125 litres of feed and covers a small tent for a cycle.

Which size should I buy?

At 4ml per litre the 500ml makes 125 litres, the 1L makes 250 litres and the 5L makes 1,250 litres. Because it is only used through propagation, veg and early flower, most home growers are well served by the 500ml or 1L; the 5L is for propagation benches and bigger rooms.

Select Size

Start With The Roots

Humic acid and seaweed, made entirely from vegetable ingredients. 4ml per litre through propagation and veg.

This site is protected by hCaptcha and the hCaptcha Privacy Policy and Terms of Service apply.

Growers First, Retailers Second

Welcome to The Grow Guys

We built The Grow Guys from the soil up — well, coco and perlite. Before we sold gear, we bought it, ran it, and learned the hard way what's worth the money and what ends up in the shed. That's the filter everything on our shelves passes through. No sales scripts, no rebadged junk, no telling you what you want to hear. Just gear we'd run ourselves and advice from people who actually grow. Chasing higher yields, tighter flowers, or your first harvest? You're in the right place.

FAQs

Order by 2pm and it ships the same business day from Invermay, Tasmania.

Calculated at checkout by weight and destination. Free shipping over $499*.

Plain packaging, no branding. No one knows what's in your box.

30-day change-of-mind returns on unopened, unused products. A 10% restocking fee applies and return shipping is at your cost.

Call, email, or walk into the Invermay shop. You'll get a grower on the other end, not a script.

Unit 10/110 Gleadow Street, Invermay 7248. Mon–Fri 8:30am–5:30pm, Sat 9am–3pm.


Recently viewed