CANNA
Now at Green Harvest
CANNA
CANNA’s own strapline is “the solution for growth and bloom” — and it’s earned over three decades of Dutch research. A specific formula for every medium you can grow in, each one tested for years before it ever reaches a shelf. Green Harvest stocks the range: Terra, Coco, Aqua and Substra bases, the organic BIOCANNA line, and the additives — Rhizotonic, Cannazym, Boost — that made the name.
Shop the line How the lines run
Why CANNA?
CANNA’s founders were growers first. Dissatisfied with the fertilizers on the market, they developed their own — and their first products, CANNA Vega and CANNA Flores (the line known today as SUBSTRA), were taken into production in the early 1990s. Three decades on, CANNA is still a research company at heart: development, research, production and logistics all stay in their own hands, every new product takes about two years to develop, and nothing is released until they are 100% certain it performs. That patience is exactly what you taste in the results — balanced, integrated formulas built for one specific medium at a time.
Two years before it ships
Every CANNA product averages two years of development and testing in their own laboratory and research centers. They only put a product on the market when they’re fully certain it will perform — no beta-testing on your crop.
One line per medium
Instead of one universal formula, CANNA builds for the substrate: Terra for soil, Coco for coco fiber, Aqua for recirculating systems, Substra for run-to-waste hydro, and BIOCANNA for organic — each balanced for how that medium actually behaves.
They wrote the standard
CANNA introduced the 1:250 mixing ratio that is now a standard across the industry. That’s what three decades of doing one thing — plant nutrition — looks like.
In-house, start to finish
From development and research through their own environmentally friendly production line to logistics, the whole process stays under CANNA’s control — which is how the bottle you buy this year matches the one from five years ago.
Meet the line
Featured
CANNA Coco Part A
Part A of the two-part base built specifically for coco fiber. Run with Part B in equal amounts from veg through flower — the flagship CANNA program in coco rooms everywhere.
CANNA Coco Part B
Part B of the Coco base — completes the pair with the balance of elements coco-grown plants take up at a high rate.
CANNA Terra Vega
One-part veg base for soil and soilless mixes, built for fast, vital growth and strong root development through the growth phase.
CANNA Terra Flores
The flowering half of the Terra line — a one-part bloom base tuned for soil-grown plants and full flower production.
CANNA Aqua Vega Part A
Part A of the base for recirculating hydro systems — veg feed formulated for NFT, ebb-and-flow and other recirculating setups.
CANNA Aqua Vega Part B
Part B of the Aqua veg pair — completes the recirculating-system base through the growth stage.
CANNA Aqua Flores Part A
Part A of the Aqua bloom base — recirculating-system flower feed, formulated so the nutrient solution stays usable longer in the tank.
CANNA Aqua Flores Part B
Part B of the Aqua bloom pair — finishes the flowering program for recirculating systems.
CANNA Bio Vega
Certified-organic veg base from the BIOCANNA line — plant-based nutrition for growers who run fully organic.
CANNA Bio Flores
The organic bloom base — BIOCANNA’s flower feed, built from natural ingredients for soil-grown crops.
CANNA Rhizotonic
The famous root stimulator — for explosive root growth, faster recovery from stress and stronger, more resilient starts.
CANNA Cannazym
Enzyme product that breaks down dead root material, turns it into plant-available nutrition and keeps the root zone clean and protected.
CANNA Boost Accelerator
Flowering stimulator that speeds up the bloom process and boosts flower production — run it from the moment the first flowers form.
CANNA PK 13/14
Pure phosphorus and potassium for the heavy flowering weeks — the finisher that firms up and bulks out the harvest.
CANNA Start
Complete, gentle one-part feed for seedlings and rooted cuttings — everything young plants need, in exactly the right proportions.
CANNA CalMag Agent
Raises EC and hardens soft or reverse-osmosis water with calcium and magnesium — the fix for soft-water grows.
Nearly the whole CANNA range comes in 1- and 5-liter bottles (CANNA Start also comes in 500 mL). The full range — including the Substra run-to-waste line, Bio Rhizotonic and Bio Boost — is in the CANNA collection.
How the lines run
| Stage / job | Run these | What they do |
|---|---|---|
| Starts & clones | CANNA Start · Rhizotonic | Gentle complete feed for seedlings and cuttings; Rhizotonic drives root growth and speeds recovery from transplant stress. |
| Soil | Terra Vega · Terra Flores | One-part veg and bloom bases made for soil and soilless potting mixes. |
| Coco | Coco A + Coco B | Two-part base formulated specifically for coco fiber, run in equal parts for the whole grow. |
| Recirculating hydro | Aqua Vega A+B · Aqua Flores A+B | Bases for recirculating systems like NFT and ebb-and-flow, formulated so the solution stays stable in the tank. |
| Run-to-waste hydro | Substra Vega A+B · Substra Flores A+B | The original CANNA line — today’s SUBSTRA — for drain-to-waste hydro; GH stocks the soft-water formulas. |
| Organic | Bio Vega · Bio Flores · Bio Boost | The certified-organic BIOCANNA program for soil growers who want to run fully natural. |
| Bloom push | Boost Accelerator · PK 13/14 | Boost stimulates flowering from the first blooms; PK 13/14 loads phosphorus and potassium in the heavy weeks. |
| Roots & enzymes | Rhizotonic · Cannazym | Root development and stress recovery up top; enzyme cleanup of dead root matter down below. |
| Water correction | CalMag Agent | Hardens soft and RO water and raises EC with calcium and magnesium before the base feed goes in. |
Anthony’s take: CANNA is the line we hand growers who are done experimenting. It isn’t the cheapest shelf in the store and it isn’t trying to be — it’s built by a research company that takes two years to release a product and still sells the first formulas it ever made. Our coco growers run Coco A & B for years at a stretch, and Rhizotonic is the root product on this shelf with the longest track record. Tell us your medium and your water, and we’ll tell you exactly which CANNA line belongs in your room.
Running CANNA, or thinking about switching?
CANNA is stocked at the shop and online, in 1- and 5-liter sizes across the line. For feed-chart help or commercial and volume pricing, stop by the shop at 82 Newbury St in Peabody, call us at 978-278-5898, or email info@ghhydro.com — we’ll get you dialed in.