HydroDynamics Clonex Gel – 1 Gal

Clonex Rooting Gel in the 1-gallon size is a water-based, hormone-enriched gel formula from HydroDynamics designed to support cutting success during propagation. It adheres directly to the stem, seals cut tissue, delivers the hormones needed to promote root cell development, and supplies a full spectrum of mineral nutrients and trace elements to nourish young roots through their formative stages.

Clonex Gel 1 Gallon Specifications

Key technical specifications for Clonex Rooting Gel in the 1-gallon (3.78 L) format. Use these figures when planning propagation bench volume requirements or ordering for commercial cloning operations.

Specification	Value
Brand	HydroDynamics International
Product Name	Clonex Rooting Gel
Size	1 Gallon (3.78 L)
Form Factor	Water-based rooting gel
Active Component	Auxin-class rooting hormones
Additional Nutrition	Full spectrum mineral nutrients and trace elements
Weight	11.0011 lb (4.99 kg)
Application Method	Direct stem dip — gel applied to freshly cut stem base

Why Choose Clonex Rooting Gel

Clonex Rooting Gel was developed as a direct answer to the limitations of older-format rooting products. Here is what distinguishes it from powder or liquid alternatives based on the manufacturer’s formulation:

• Gel adhesion keeps hormones at the wound site. Because Clonex is a gel rather than a powder or liquid solution, it stays in contact with the cut stem throughout the rooting process. This sustained contact ensures the hormones and nutrients reach the developing tissue without washing or falling away.
• Seals the cut tissue immediately. The gel physically seals the cut end of the stem at the moment of application, reducing the risk of air embolism and pathogen entry into the wound site during the critical first hours after taking a cutting.
• Delivers rooting hormones and protective vitamins together. Beyond the hormone complex that stimulates root cell development, Clonex includes vitamins to protect the delicate new root tissue during its initial formation — a combination not found in basic hormone powder formulas.
• Full-spectrum mineral nutrition from day one. The gel contains a complete range of mineral nutrients and trace elements, so the cutting has access to foundational nutrition before it can absorb anything from growing media or a hydroponic reservoir. This is especially valuable in inert media such as rockwool or perlite.
• 1-gallon format for commercial and high-volume propagation. At this volume, Clonex is priced and packaged for commercial propagation benches, professional nursery operations, and large-scale indoor growing facilities that require a consistent, reliable rooting protocol across many cuts per cycle.

Best Uses for Clonex Gel

Clonex Rooting Gel is intended for vegetative propagation of cuttings. The following use cases represent the most common and practical applications in controlled growing environments:

• Rockwool and stonewool propagation. Clonex is widely used in rockwool-based propagation systems. After dipping the stem base in gel, insert the cutting directly into a pre-moistened rockwool cube. The gel adheres well to both the stem and the surrounding cube material, maintaining contact in the moist environment of a humidity dome.
• Aeroponic cloning machines. In aeroponic propagators where cuttings are held in neoprene collars and misted with plain water or a light nutrient solution, Clonex on the stem base provides the hormone and nutrient signal needed to initiate rooting even in the absence of a growing medium. Because the gel is water-based, it does not block aeroponic mist nozzles if residue drips into the reservoir.
• Soilless and hydroponic inert media. For cuttings placed into perlite, coco coir plugs, or rapid rooter-style plugs, Clonex supplies early-stage nutrition that the inert media cannot provide. This reduces the gap between taking the cut and the first feeding from an external nutrient solution.
• Commercial propagation operations. The 1-gallon container is suited to propagation facilities where hundreds or thousands of cuttings are processed per cycle. A bulk format allows teams to work from a shared stock container, maintain batch consistency, and reduce per-cutting cost compared to smaller retail sizes.
• Mother plant programs. Growers running dedicated mother plants who take regular cutting cycles benefit from the consistency of a commercial-size Clonex supply — same formula, same result batch after batch, without the variability that can come from switching between different rooting products or formulations.

For operations that also need to support established plant root systems during transplant stress, Advanced Nutrients Tarantula is a beneficial microbe inoculant that can complement a rooting gel protocol during the transition from clone to established plant.

Clonex Gel vs. Rooting Powders and Alternatives

The rooting hormone market includes three primary delivery formats — powder, liquid, and gel — and the differences matter when managing a propagation program at scale.

Clonex Gel vs. Rooting Powder: Powders typically contain IBA (indole-3-butyric acid) or NAA (naphthaleneacetic acid) in a talc carrier. They require the cut stem to be pre-moistened before dipping so the powder adheres, and residue falls off readily when the cutting is inserted into wet media. The powder carrier does not seal the wound, does not supply nutrients, and does not contain vitamins. Clonex as a gel remains on the stem throughout the rooting process without requiring a pre-moistening step and without shedding from the wound site.

Clonex Gel vs. Liquid Rooting Concentrates: Liquid rooting dips require mixing to a target concentration, and the cutting is submerged for a set dip time rather than coated. Liquids dilute quickly in high-moisture environments and do not maintain a sustained hormone concentration at the wound site the way a gel does. Liquid concentrates also typically lack the full mineral nutrient package included in Clonex.

Clonex Gel vs. Aloe-Based and Organic Alternatives: Organic propagation communities sometimes use raw aloe vera gel or willow water as natural rooting aids. These can support rooting in healthy genetics under optimal conditions but do not deliver a standardized hormone concentration, do not seal the wound in the same manner, and lack the trace element profile of a purpose-formulated product. For commercial or semi-commercial operations where cutting success rate directly affects crop yield and schedule consistency, a standardized gel is the more predictable choice.

Clonex Gel in the 1-gallon format vs. smaller retail sizes: The 1-gallon container reduces per-application cost significantly compared to 100 mL or 300 mL retail sizes. For any operation taking more than a few dozen cuttings per month, the bulk format is generally more economical and eliminates frequent reordering. If you are managing root development across a larger system, pairing Clonex with a dedicated root stimulator such as Heavy 16 Roots in your reservoir can further support the transition from clone to established plant.

Compatibility with Other Nutrients and Growing Systems

Clonex Rooting Gel is designed as a topical application product applied to the stem base of cuttings at the time of propagation. It is not mixed into a reservoir or nutrient solution, which means it does not interact directly with hydroponic system chemistry.

Growing media compatibility: Clonex is compatible with all standard propagation substrates including rockwool, stonewool, coco coir, perlite, vermiculite, rapid rooter plugs, and soil. The water-based gel formula does not leave hydrophobic residue in media and does not interfere with the substrate’s moisture retention characteristics.

Hydroponic system types: Cuttings rooted with Clonex can be transferred into any hydroponic system once root development is established — NFT (nutrient film technique), DWC (deep water culture), ebb and flow, drip systems, aeroponics, or media-based systems. The gel does not introduce foreign chemistry into the reservoir because it is used before the plant enters the hydroponic system.

Nutrient line compatibility: Because Clonex is applied topically and not added to nutrient solution, it is compatible with any commercial or custom nutrient program. Once cuttings are established and moved to a grow system, any base nutrient line can be introduced without concern about interactions with residual Clonex. For growers using a dedicated additive program during the vegetative stage, products like PureCrop1 can be added to the foliar or preventive care regimen independently of the Clonex rooting protocol.

Storage and shelf compatibility: Clonex is a water-based gel and should be stored at room temperature, away from freezing and direct sunlight. The 1-gallon container should be sealed between uses to prevent contamination of the bulk stock. Do not return used gel that has contacted stems back into the original container — pour or dispense into a small working cup for each propagation session.

Usage Instructions

Clonex is applied once, at the time of taking cuttings, and requires no mixing or dilution. The following steps reflect standard propagation practice using a gel rooting compound:

1. Prepare your tools and media. Pre-soak propagation cubes or plugs in pH-adjusted water (5.5–6.0 for most media). Sterilize cutting tools — a sharp razor blade or scalpel is preferred over scissors, which can crush stem tissue. Have your humidity dome and propagation tray ready before taking cuts.
2. Take the cutting. Select a healthy internode from a vigorous mother plant. Make a clean, angled cut (45°) just below a node. The cutting should be 3–6 inches in length with 1–2 leaf nodes. Remove lower leaves to keep them clear of media and limit transpiration load on the unrooted cutting.
3. Dispense a working amount of Clonex. Pour a small quantity of gel into a clean, disposable cup or shallow dish. Never dip directly from the main 1-gallon container — this prevents contamination of the bulk stock.
4. Dip the stem base in Clonex. Immediately after taking the cut, dip the bottom 0.5–1 inch of the stem into the working gel and rotate gently to ensure even coating around the cut surface. Keep the cut end in contact with gel for 2–3 seconds.
5. Insert into propagation media. Place the gel-coated stem directly into a pre-prepared rockwool cube, rapid rooter, or similar plug. Avoid wiping the gel off the stem during insertion — a slow, straight insertion minimizes gel removal.
6. Cover and maintain humidity. Place the tray under a humidity dome. Target 75–80% relative humidity and temperatures of 72–78°F (22–26°C). Bottom heat (72–75°F at the root zone) can accelerate rooting. Mist the underside of the dome or the leaves lightly once or twice daily to maintain humidity without saturating the media.
7. Monitor and transplant. Visible root tips typically emerge from rockwool cubes within 7–14 days depending on species, temperature, and cutting health. Once roots are 1–2 cm outside the cube, the cutting is ready to transplant into its permanent system or container.

How to Get the Most from Clonex Gel

The following practices help maximize cutting success rates when using Clonex Rooting Gel in a professional or high-volume propagation setting:

• Speed from cut to gel. The single most important variable in cutting success is minimizing the time between making the cut and dipping in Clonex. Air exposure causes the cut end to begin sealing and can allow an air bubble to enter the stem. Have your working cup of gel positioned so you can dip within seconds of making each cut.
• Use sharp, clean cutting tools. A compressed stem from dull scissors creates irregular wound geometry that reduces gel contact area. A razor blade or scalpel produces a clean, flat cut surface that accepts gel evenly across the entire wound.
• Do not over-saturate propagation media. Waterlogged cubes or plugs reduce oxygen availability at the stem base and can promote pathogen development. Pre-soak media and allow excess water to drain before use. During the propagation period, mist lightly — do not water the media directly unless it shows signs of drying out.
• Maintain consistent root-zone temperature. Root zone temperatures below 68°F significantly slow rooting time. A propagation heat mat set to 72–75°F at the tray surface provides consistent warmth without raising air temperatures to levels that increase transpiration stress on the unrooted cuttings.
• Protect bulk stock from contamination. The 1-gallon container represents a significant volume investment. Always work from a poured-out sub-quantity and seal the main container after each use. Store the container away from light and temperature extremes. A contaminated bulk container results in failed cuttings across an entire propagation cycle.
• Combine with a sound sanitation protocol. Clonex addresses the hormonal and nutritional needs of the cutting but does not replace good propagation hygiene. Clean trays and domes between cycles, use fresh media for each batch, and sanitize cutting tools between plants to prevent cross-contamination.

For growers managing a full vegetative and flowering program, incorporating a root zone support product during the established plant phase can extend the benefits of a strong early root structure. Products designed specifically for root development, such as those in the Advanced Nutrients Tarantula line, can be used once cuttings have been transplanted and are feeding from a nutrient program.

Sources & Further Reading