Canna Terra Professional Plus 50 Litre - Grow-Room Specific Soil Mix
Best for: Indoor growers who want a potting mix built specifically for grow-room conditions rather than a general outdoor-friendly soil.
Our thoughts
This is CANNA's step-up soil - the same core Terra philosophy as their standard Professional mix, but with a longer-lasting pH and nutrient charge built in, so it holds up better over a full indoor cycle without you having to correct it partway through.
Canna Terra Professional Plus is composed of airy peat moss and types of tree bark with antiseptic properties, formulated specifically for indoor grow-room use (though it works outdoors too). The bark component and structure are aimed at promoting strong root development and thicker stems, with a faster metabolism supporting increased yields.
The medium is pH-adjusted with a lime charge large enough to last a full cycle, and carries a mineral-nutrient starter charge that's tuned specifically to work with CANNA Terra nutrients rather than a generic feed. It also contains trace elements and chelates to protect the plant through the growth cycle, and has a structure built to hold an optimum balance of air and water.
How it compares
Premium soil mixes are judged on how long their built-in charge lasts and how targeted they are to a specific feeding system.
- CANNA's own standard Terra Professional is a simpler, more general-purpose version without the longer-lasting lime charge and antiseptic bark component
- BioBizz's Light-Mix takes a lighter, lower-charge approach designed for growers who want to add most of their own nutrition from early on
- Plagron's Light Mix similarly leaves more room for the grower to build up feeding gradually rather than starting from a bigger pre-set charge
Terra Professional Plus is the higher-spec end of CANNA's soil range, built to hold its pH and nutrient balance for longer with less intervention needed from you.
Usage guidance
The mix is designed to be used straight from the bag with minimal preparation.
Filling pots
Loosen the mix and fill pots, compressing it slightly, then add water until a little starts to drain through before placing the plant in.
Pot size
Use 5 litre pots or larger for bigger plants, since larger pots keep the root environment more stable.
Watering
Adult plants typically evaporate 4-6 litres of moisture a day per square metre - adjust to the plant's actual growth stage and conditions rather than a fixed schedule.
Drainage
Make sure there's sufficient drainage, adding a thin layer of hydro-granules at the base of the pot if needed.
Storage
Store in a cool, dry place and don't let it drop below 4°C before use.
Technical specifications
- Composition: Airy peat moss and antiseptic tree bark types
- Pack size: 50 litres
- pH treatment: Long-lasting lime charge for a full cycle
- Nutrient charge: Mineral-nutrient starter charge tuned to CANNA Terra nutrients
- Added elements: Trace elements and chelates
- Recommended minimum pot size: 5 litres
- Storage: Cool, dry place, not below 4°C
- Packaging: 100% recyclable
- Brand: CANNA
Who this is for
- Indoor growers who want a soil built specifically for grow-room conditions
- Growers running CANNA Terra Vega and Flores who want the medium tuned to match
- Anyone who wants a longer-lasting pH and nutrient charge with less mid-grow correction
Best suited to indoor setups where you want the medium doing more of the work for the full length of a cycle.
Our take
It's the version of CANNA's soil mix built for people who want fewer surprises mid-grow - the longer charge and grow-room-specific formulation earn the "Plus" in the name.
Worth stepping up to if you're running an indoor cycle and want the medium to hold its balance the whole way through.
