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Canna Rhizotonic 0.5l
CANNA Rhizotonic 0.5 L is the working size of the seaweed-based root stimulant, aimed at growers who add it to every feed rather than to the occasional rescue mix. At the vegetative rate of 20 ml per 10 litres, a 500 ml bottle covers roughly 250 litres of nutrient solution, enough for a complete cycle in a single space. The concentrated Ascophyllum nodosum extract supplies organic matter, vitamins and minerals to the root zone, adds almost no EC and stays stable once diluted. Suitable for every medium and irrigation method, usable as a foliar spray on unrooted cuttings, and good for two years sealed in a dark, frost-free spot. Order online for shipping across Europe.
CANNA Rhizotonic 0.5 L — the working size of the seaweed root stimulant
CANNA Rhizotonic 0.5 L is a root stimulant based on a concentrated extract of the brown seaweed Ascophyllum nodosum, supplied in a 500 ml bottle. It supports root-zone development in cuttings, seedlings and repotted plants, adds minimal EC and works across every substrate and irrigation method. The bottle belongs to the wider selection on the CANNA brand page.
Running the numbers on 500 ml
Formulation and dosage are identical across bottle sizes; only autonomy changes. At the vegetative rate of 20 ml per 10 litres, 500 ml yields around 250 litres of nutrient solution. Leaning on the 40 ml first dose brings that down to roughly 125 litres, while the 5 ml generative rate stretches the bottle considerably further. For a single room run over a full cycle, this size removes mid-cycle reordering and lowers cost per millilitre against the entry bottle.
- Continuous use: enough volume to include the stimulant in every watering rather than only at transplant.
- Two-year shelf life: leftover product carries over to the next run without loss of quality.
- Stable when diluted: a mixed reservoir holds its character between scheduled changes.
- Dual application: root drench through the feed and foliar spray on unrooted cuttings.
Dosage protocol
Shake before every use. Apply 40 ml per 10 litres as the first dose and after each repot, 20 ml per 10 litres throughout vegetative growth, and 5 ml per 10 litres during the generative stage alongside your bloom feed. Set pH last, once base nutrient and all additives are in the reservoir, since every addition shifts the reading. Recirculating and drip systems call for a full solution change every five to seven days. Because EC contribution is minimal, the product can also run during germination, where it softens the seed coat and supports the emerging taproot. Going above the published rates offers no advantage and loads the substrate unnecessarily; adjust how often you apply it rather than how strong the mix is. One practical detail: a 500 ml bottle pours more evenly than a small one, which makes measuring 20 ml noticeably more accurate.
Technical specifications
| Product type | Root stimulant / vitaliser |
|---|---|
| Active base | Ascophyllum nodosum extract (North Atlantic seaweed) |
| Volume | 0.5 L (500 ml) |
| First dose and repotting | 40 ml per 10 L of water |
| Vegetative stage | 20 ml per 10 L of water |
| Generative stage | 5 ml per 10 L of water |
| Application | Nutrient solution and foliar spray |
| Compatible media | Peat mixes, coco, rockwool and clay pebbles |
| Shelf life | 2 years, bottle closed |
| Storage | Dark and frost-free |
Matching additives in the same size
As an additive, Rhizotonic sits beside a base nutrient rather than replacing it. CANNAZYM 0.5 L handles dead root material left in the medium and pairs naturally with root-zone work. For the flowering window, CANNA PK 13/14 0.5 L lifts phosphorus and potassium over a short period, while CANNA Boost 0.5 L targets the same stage from a different angle.
Choose this bottle when the root stimulant is a fixed line on the feed chart instead of an occasional purchase. Order CANNA Rhizotonic 0.5 L online for fast shipping across Europe.
How many litres of feed does a 500 ml bottle cover?
About 250 litres at the vegetative rate of 20 ml per 10 litres. Relying mainly on the 40 ml first dose cuts that to roughly 125 litres, while the 5 ml generative rate stretches CANNA Rhizotonic 0.5 L much further. Your real figure depends on which stage dominates your cycle and how often you water.
Which size should I buy: 250 ml or 500 ml?
The formula is the same, so it comes down to frequency. Occasional use at cloning and repotting fits the small bottle. Adding the stimulant to every watering, or running several cycles a year, makes the 500 ml bottle the better value per millilitre and removes the risk of running dry halfway through a cycle.
Can I mix it with other additives in the same reservoir?
Yes. Add the base nutrient first, then the additives including Rhizotonic, stir the reservoir and only then measure and correct pH. Each addition moves the reading, so a final check prevents working from a false value. In recirculating setups, replace the whole solution every five to seven days.
Do you ship this size across Europe?
Yes, orders leave our Belgian warehouse for destinations throughout Europe. The 500 ml bottle ships upright with a sealed cap and needs no special handling. Store it dark and frost-free after delivery and the two-year shelf life applies even once the bottle has been opened.
