Emerald Harvest Grow - Vegetative-Stage Base Nutrient from a 3-Part System
Best for: growers running Emerald Harvest's 3-part Grow, Micro and Bloom system who need the vegetative-stage base nutrient.
Our thoughts
This is the vegetative building block of Emerald Harvest's base line, not a flowering feed, so don't reach for it expecting a bloom booster. Used as intended, alongside Micro and Bloom, it's a clean, well-regarded mineral base that pushes solid vegetative growth before you switch phases.
Emerald Harvest Grow is one third of the brand's professional 3-part base nutrient series, designed to be used alongside Micro and Bloom throughout the growing cycle. Grow carries an NPK ratio of around 2-1-6, and it's the component that drives vegetative development, supporting strong stems and foliage as the plant builds out its structure before flowering. Emerald Harvest is a California-founded brand (Santa Rosa, established 2015) now distributed through Hawthorne Gardening Company, and their 3-part series is built around the idea of giving growers precise control without an overcomplicated line-up of bottles.
Within the 3-part system, Micro (NPK roughly 5-0-1) supplies the core micronutrient and nitrogen base used throughout the whole grow, Grow adds the extra nitrogen and potassium needed for vegetative bulk-up, and Bloom (NPK roughly 0-5-4) takes over the phosphorus and potassium load once plants flip to flowering. Grow itself is used at every stage of growth, vegetative and bloom, but at a higher relative dose during veg. Emerald Harvest recommend mixing Micro into your water first, then Grow, then Bloom, at a general dosage of 0.5 to 2ml per litre.
How it compares
As a 3-part mineral base, Grow sits alongside the other major multi-part systems on the market.
- Vs General Hydroponics FloraGro: FloraGro is the equivalent vegetative-stage bottle in GH's long-established Flora Series 3-part system, offering a similar level of control at a comparable price point.
- Vs Canna Terra Vega: Terra Vega does the same vegetative job in a single bottle rather than a 3-part system, trading some fine-tuning for simplicity.
- Vs BioBizz Bio-Grow: Bio-Grow is a certified organic single-bottle vegetative feed, whereas Grow is a mineral component of a multi-part system aimed at growers who want to dial in ratios precisely.
You take on an extra bottle and a bit more mixing complexity compared with a one-part feed, in exchange for finer control over exactly how much nitrogen, phosphorus and potassium your plants get at each stage.
Usage guidance
Mixing order and dosage both matter with a 3-part system.
Mixing order
Add Micro to your water first, then Grow, then Bloom, mixing thoroughly between each addition to avoid nutrient lockout in the reservoir.
Dosage
Use Grow at roughly 0.5 to 2ml per litre, with the higher end of that range typically used during the vegetative stage when Grow's contribution matters most.
Through the cycle
Grow continues to be used at a reduced rate through flowering alongside Bloom, rather than being dropped completely once plants switch stages.
Water source
Check your source water's existing calcium and magnesium levels, and add Emerald Harvest Cal-Mag separately if you're on coco or RO water.
Technical specifications
- NPK ratio: approximately 2-1-6
- Role in system: vegetative-stage base nutrient (3-part system with Micro and Bloom)
- Micro NPK (for reference): approximately 5-0-1
- Bloom NPK (for reference): approximately 0-5-4
- Dosage: 0.5-2ml per litre
- Mixing order: Micro, then Grow, then Bloom
- Sizes available: 0.95L, 1.89L, 3.79L
- Vendor: Emerald Harvest (Santa Rosa, California)
Who this is for
- Growers already running or planning to run the full Emerald Harvest 3-part system
- Anyone who wants precise, adjustable control over vegetative-stage NPK ratios
- Hydro and coco growers wanting a mineral base built specifically for multi-part dosing
- Growers moving up from a one-part feed who want more granular control
Best suited to the vegetative stage of a grow running the full Grow, Micro and Bloom line together.
Our take
Grow does one job well: driving vegetative structure as part of a properly balanced 3-part mineral system, and it needs Micro and Bloom alongside it to do that job properly.
Works consistently without overcomplicating your feeding schedule, provided you've got the other two bottles to go with it.
