CANNA RHIZOTONIC

CANNA RHIZOTONIC is a 100% natural root stimulator derived from Ascophyllum nodosum (North Atlantic seaweed) with an NPK of 0.6-0.2-0.6. It contains over 60 microbiological substances including vitamins B1 and B2, trace elements, and oligosaccharides that support root development, stress recovery, and overall plant vitality. RHIZOTONIC works in all growing media—soil, coco coir, clay pebbles, rockwool, and inert hydroponic substrates—and can be applied as a root drench, foliar spray, or seed soak.

CANNA RHIZOTONIC Specifications

The specifications below are drawn from the official CANNA product pages at cannagardening.com and canna-uk.com, supplier data from DS Urban Farm and HTG Supply, and the confirmed NPK analysis from multiple independent sources.

Specification	Value
Brand	CANNA
Product type	Concentrated root stimulator
NPK analysis	0.6-0.2-0.6
Total Nitrogen (N)	0.6%
Available Phosphate (P₂O₅)	0.2%
Soluble Potash (K₂O)	0.6%
Base ingredient	Ascophyllum nodosum (North Atlantic seaweed extract)
Active compounds	60+ microbiological substances including vitamins B1 and B2, trace elements, and oligosaccharides
Formulation	100% natural liquid concentrate
Initial application rate	0.5 fl oz per gallon (40 mL per 10 L)
Maintenance application rate	0.07 fl oz per gallon (5 mL per 10 L), ratio 1:2000
Vegetative stage rate	20 mL per 10 L
Foliar spray rate	20 mL per 10 L
Cutting/transplant rate	4 mL per 1 L (soak 15–30 minutes)
Seed soaking rate	40 mL per 10 L
Compatible media	Soil, coco coir, clay pebbles, rockwool, all inert substrates
Available sizes	250 mL, 1 L, 5 L, 10 L, 20 L
Shelf life	6–12 months after opening
Storage	Cool, dark, frost-proof location; away from temperature extremes

Why Choose CANNA RHIZOTONIC

The points below are drawn from the official CANNA product pages (cannagardening.com and canna-uk.com), tier-2 supplier data from DS Urban Farm, and ingredient analysis from growtent.eu.

• 100% natural formulation derived from North Atlantic seaweed. CANNA RHIZOTONIC is extracted from Ascophyllum nodosum, a brown algae species harvested from the North Atlantic. The formulation contains no synthetic growth hormones, chemical rooting powders, or artificial additives. This makes it suitable for growers who prefer natural inputs in their feeding programs. The seaweed base provides the carrier matrix for the 60+ microbiological substances, vitamins, and trace elements that constitute the product’s active profile.
• Contains over 60 microbiological substances including vitamins B1 and B2. The formulation delivers vitamins B1 (thiamine) and B2 (riboflavin), trace elements, and oligosaccharides. Vitamin B1 is widely recognized in horticulture for supporting root development and stress recovery. Oligosaccharides function as signaling compounds that stimulate root cell growth. This multi-compound approach provides a broader spectrum of root-zone activity than single-ingredient rooting products.
• Works across all growing media and system types. RHIZOTONIC is confirmed compatible with soil, coco coir, clay pebbles (hydroton), rockwool, and all inert hydroponic substrates. It can be used in drip systems, recirculating reservoirs, hand-watered containers, and flood-and-drain setups. This universal media compatibility eliminates the need for separate root stimulators for different growing systems within the same operation.
• Multiple application methods: root drench, foliar spray, seed soak, and cutting treatment. Unlike root stimulators limited to a single delivery method, RHIZOTONIC can be applied as a standard root-zone drench, a foliar spray for above-ground absorption, a seed-soaking solution to soften seed coats and improve germination, or a cutting treatment where propagation plugs are soaked before planting. Each method has a published dose rate from CANNA, giving growers specific guidance rather than guesswork.
• Supports stress recovery and transplant shock reduction. CANNA positions RHIZOTONIC specifically as a stress-tolerance product. The official product tagline is “Natural Root Booster for Stress Tolerance.” The combination of vitamins and oligosaccharides is formulated to help plants recover from environmental stress, transplant shock, pest damage, and disease pressure by stimulating new root growth and improving nutrient uptake capacity at the root zone.

Best Uses for CANNA RHIZOTONIC

The use cases below are derived from the product’s published application rates, compatible media list, and category placement as a root additive within the Nutrients & Additives > Additives > Roots taxonomy.

• Propagation and cloning. RHIZOTONIC is used as a rooting aid for cuttings and clones. Soak propagation media (rockwool cubes, peat plugs, or similar) in a solution of 4 mL per 1 L of water for 15–30 minutes before inserting cuttings. This pre-soak delivers vitamins and oligosaccharides directly to the cutting’s stem base where root initiation occurs. Growers propagating in an incubator tray and dome system can treat inserts with RHIZOTONIC solution before placing cuttings.
• Transplanting and re-potting. When moving plants between containers or from propagation trays to final pots, RHIZOTONIC applied at the initial dose rate (40 mL per 10 L) helps reduce transplant shock. The stress-recovery properties of the vitamin B1 and oligosaccharide content support new root growth into unfamiliar substrate, shortening the recovery window after transplant.
• Seed germination and soaking. RHIZOTONIC is used as a seed soak at 40 mL per 10 L of water. The solution softens seed coats and delivers trace elements and vitamins to the germinating embryo. This application is relevant for hard-shelled seeds or varieties with historically low germination rates.
• Vegetative-stage root development in hydroponic systems. During the vegetative growth phase, RHIZOTONIC applied at 20 mL per 10 L supports ongoing root mass development in recirculating hydroponic systems, DWC buckets, and drip-fed containers. A healthy root system established during vegetative growth directly affects nutrient uptake capacity during the flowering phase.
• Stress recovery after environmental events. Plants that have experienced heat stress, overwatering, root rot, pest damage, or nutrient lockout benefit from RHIZOTONIC application at the initial dose rate. The product’s formulation is specifically designed for stress-tolerance support, making it a corrective tool rather than just a preventive one.
• Foliar feeding for rapid nutrient delivery. When root-zone conditions are compromised (waterlogged substrate, damaged root system), foliar application at 20 mL per 10 L provides an alternative absorption pathway. The vitamins and trace elements in RHIZOTONIC can be taken up through leaf stomata, bypassing the root zone entirely until root health is restored.

CANNA RHIZOTONIC vs HEAVY 16 Roots

CANNA RHIZOTONIC and HEAVY 16 Roots are both root stimulators in the Nutrients & Additives category, but they differ in formulation philosophy, ingredient sourcing, and application approach. HEAVY 16 Roots is available at Premier Hydro as the HEAVY 16 Roots 55 Gallon format.

CANNA RHIZOTONIC (this product): A 100% natural liquid concentrate derived from Ascophyllum nodosum seaweed. NPK of 0.6-0.2-0.6. Contains 60+ microbiological substances, vitamins B1 and B2, and oligosaccharides. Applied at rates ranging from 5 mL per 10 L (maintenance) to 40 mL per 10 L (initial dose). Available in sizes from 250 mL to 20 L. Can be used as a root drench, foliar spray, seed soak, or cutting treatment. The formulation emphasizes natural stress tolerance and root stimulation through vitamin and oligosaccharide delivery.

HEAVY 16 Roots (comparator): A synthetic-organic hybrid root stimulator from the HEAVY 16 product line. HEAVY 16 Roots uses a proprietary blend that includes both synthetic and organic-derived ingredients. The product is positioned for commercial-scale operations, with the 55-gallon drum format reflecting large-reservoir and multi-room production use. HEAVY 16’s formulation approach emphasizes broad-spectrum microbial support and root-zone conditioning rather than the single-source seaweed extract approach that CANNA uses.

Key trade-offs:

• RHIZOTONIC’s 100% natural, single-source formulation (Ascophyllum nodosum) appeals to growers who want to keep their input programs entirely natural. HEAVY 16 Roots uses a hybrid approach that may include synthetic components.
• RHIZOTONIC offers more granular dose-rate guidance with published rates for five distinct application methods (root drench, foliar, seed soak, cutting treatment, and maintenance). HEAVY 16 Roots is primarily a root-zone additive.
• RHIZOTONIC is available in smaller sizes (250 mL, 1 L) suitable for hobby growers and small operations. HEAVY 16 Roots in the 55-gallon format is oriented toward commercial-scale production.
• Both products target root development and stress recovery. The choice depends on whether the grower prioritizes all-natural formulation (RHIZOTONIC) or commercial-scale bulk availability and a hybrid ingredient approach (HEAVY 16 Roots).

Compatibility & Operating Range

The compatibility information below is drawn from the official CANNA product pages at cannagardening.com and canna-uk.com, and the DS Urban Farm supplier listing.

Growing media compatibility: CANNA RHIZOTONIC is confirmed compatible with all common growing media: soil and peat-based mixes, coco coir, clay pebbles (hydroton), rockwool, perlite, vermiculite, and all inert hydroponic substrates. The liquid formulation dissolves fully into water-based nutrient solutions without leaving undissolved solids that could clog drip emitters or irrigation lines.

Growing system compatibility: Compatible with hand-watered containers, drip irrigation, recirculating deep water culture (DWC), nutrient film technique (NFT), flood and drain (ebb and flow), and aeroponic systems. For recirculating systems, CANNA recommends renewing the nutrient solution every 5–7 days to maintain freshness and prevent microbial buildup in the reservoir.

Nutrient program compatibility: RHIZOTONIC is an additive, not a base nutrient. It is designed to be used alongside a complete base nutrient program. CANNA recommends pairing it with their own CANNA TERRA, CANNA COCO, or CANNA AQUA base nutrient lines, but the product can be integrated into any nutrient program regardless of brand. Add RHIZOTONIC to the reservoir after base nutrients are mixed and pH-adjusted. When stacking with other root stimulators or additives, verify final EC is within the target range for the current growth stage before feeding. Products like Advanced Nutrients Tarantula (a beneficial bacteria supplement) serve a complementary function to RHIZOTONIC’s vitamin and oligosaccharide delivery.

pH operating range: Maintain nutrient solution pH between 5.2 and 6.2 for hydroponic applications. RHIZOTONIC’s low NPK contribution (0.6-0.2-0.6) means it has minimal impact on solution pH and EC when added at recommended rates. Check pH after mixing and adjust as needed.

Temperature and storage: Store the concentrate in a cool, dark, frost-proof location. Avoid extreme heat and direct sunlight. Shelf life is 6–12 months after opening. Do not use concentrate that has changed color, developed an unusual odor, or shows visible contamination.

Dosing Guidelines

The dosing information below is drawn from the official CANNA product pages at cannagardening.com (US market rates in fl oz/gal) and canna-uk.com (metric rates in mL/L), cross-referenced with the growtent.eu ingredient and dosage article.

Initial / first-week dose: 0.5 fl oz per gallon (40 mL per 10 L). Use this rate when first introducing RHIZOTONIC to your feeding program, after transplanting, or during stress recovery events. This is the highest recommended concentration and is intended for short-term use (typically 1 week) before tapering to the vegetative or maintenance rate.

Vegetative stage dose: 20 mL per 10 L. Use during the active vegetative growth phase to support ongoing root mass development. This rate provides a moderate level of vitamin and oligosaccharide delivery sufficient for healthy plants that are not under stress.

Maintenance / generative stage dose: 0.07 fl oz per gallon (5 mL per 10 L), a ratio of 1:2000. This is the lowest recommended rate, used during the generative (flowering) phase when root stimulation demand is lower and the plant’s energy is directed toward floral development. Continue at this rate until harvest or until the flush phase begins.

For cuttings and transplanting: Mix 4 mL per 1 L of water. Soak the propagation medium (rockwool cubes, peat plugs, or root balls) in this solution for 15–30 minutes before inserting cuttings or placing transplants. This pre-soak delivers a concentrated dose of root-stimulating compounds directly to the cutting base or root zone.

For seed soaking: Mix 40 mL per 10 L of water. Soak seeds in this solution for 12–24 hours before planting to soften seed coats and deliver trace elements to the germinating embryo.

For foliar feeding: Mix 20 mL per 10 L of water. Apply as a fine mist to leaf surfaces, covering both upper and lower leaf sides. Foliar application is most effective when root-zone conditions are compromised or when rapid nutrient delivery is needed through an alternative absorption pathway. Apply during lights-off or low-light periods to reduce evaporation and maximize stomatal absorption.

Re-potting: Use the initial dose rate (40 mL per 10 L) for the first watering after re-potting, then taper to the vegetative or maintenance rate based on the plant’s growth stage.

Recirculating systems: Renew the nutrient solution containing RHIZOTONIC every 5–7 days. Do not allow the mixed solution to sit in a reservoir for extended periods, as the natural organic compounds can degrade or support unwanted microbial growth over time.

Size selection by use case:

• 250 mL: Trial size for small propagation runs or single-plant stress recovery.
• 1 L: Standard size for hobby growers with 2–10 plants; covers several weeks of vegetative-stage application at 20 mL/10 L.
• 5 L: Mid-scale operations with multiple containers or a small recirculating system.
• 10 L / 20 L: Commercial-scale production with large reservoirs or multi-room operations.

How to Set Up CANNA RHIZOTONIC in Your Feeding Program

The steps below describe integrating CANNA RHIZOTONIC into a nutrient program from initial preparation through ongoing use. These steps are adapted from the official CANNA dosing guidance and the per-category nutrient supplement setup template.

1. Shake the bottle thoroughly before each use. RHIZOTONIC is a natural liquid concentrate containing seaweed-derived compounds that can settle during storage. Shake vigorously for 15–20 seconds before measuring to ensure a homogeneous mixture. Do not use concentrate that has separated and cannot be re-mixed by shaking.
2. Determine the correct dose rate for your application. Select the appropriate rate based on your current situation: 40 mL per 10 L for initial application, transplanting, or stress recovery; 20 mL per 10 L for vegetative-stage root development or foliar feeding; 5 mL per 10 L for maintenance during the generative phase. For cutting treatment, use 4 mL per 1 L.
3. Prepare your base nutrient solution first. Mix your base nutrients (CANNA TERRA, CANNA COCO, CANNA AQUA, or your preferred base line) in the reservoir or mixing vessel at the rates appropriate for the current growth stage. Measure EC after the base nutrients are fully dissolved. RHIZOTONIC is an additive and does not replace base nutrients.
4. Measure the RHIZOTONIC dose using a calibrated syringe or measuring cup. Add the measured concentrate to the reservoir while the recirculation pump is running or while stirring. For a 10 L reservoir at the vegetative rate, measure 20 mL. For a 20 L reservoir at the initial rate, measure 80 mL. Do not add undiluted concentrate directly onto plant roots or substrate.
5. Verify pH and EC after mixing. After adding RHIZOTONIC and any other additives, check solution pH and EC. Target pH 5.2–6.2 for hydroponic applications. RHIZOTONIC’s low NPK (0.6-0.2-0.6) contributes minimally to EC, but always verify before feeding. Adjust pH with pH-up or pH-down as needed.
6. Feed on your regular schedule. Apply the mixed solution at your normal watering interval. For recirculating systems, renew the solution every 5–7 days. For hand-watered containers, prepare a fresh solution for each watering.
7. Taper the dose as the plant matures. Start at the initial rate (40 mL/10 L) for the first week, transition to the vegetative rate (20 mL/10 L) during active growth, and reduce to the maintenance rate (5 mL/10 L) during flowering. This tapering matches the plant’s decreasing root stimulation demand as it shifts energy toward floral development.
8. Store properly between uses. Reseal the bottle and store in a cool, dark, frost-proof location. Avoid direct sunlight and temperature extremes. Properly stored RHIZOTONIC has a shelf life of 6–12 months after opening.

Sources & Further Reading