Emerald Harvest is a Californian nutrient company that does something unusual: it publishes its formulations honestly and prices them without the premium that usually comes attached to American nutrient brands. You get a choice of a simple two-part or a fully adjustable three-part base, and a small set of additives that each earn their place.
Cali Pro two-part: Cali Pro Grow A&B and Cali Pro Bloom A&B - the simple route. See all base nutrients.
Three-part system: Grow, Micro and Bloom for growers who want to set the ratio themselves at each stage.
Starter kits: 2-Part Cali Pro and 3-Part GMB Kick Starter kits with everything matched - browse nutrient starter kits.
Organic stimulants: Emerald Goddess, a kelp and amino based tonic used through the whole cycle - see organic nutrients.
Bloom boosters: King Kola for flower bulk and Honey Chome for late-stage quality - more bloom enhancers.
Structure and roots: Sturdy Stalk for silicon-supported stem strength and Root Wizard for root development.
Cal-Mag: Emerald Harvest Cal Mag for coco and RO water - see all Cal-Mag.
Why choose Emerald Harvest?
Choice without complication. Very few brands offer both a two-part and a three-part base in the same product family, so you can start simple and move to full control without changing brands. The additives are also genuinely distinct from each other rather than five versions of the same bloom booster.
Emerald Harvest FAQs
Two-part or three-part? Cali Pro two-part is easier and perfectly capable. The three-part GMB system lets you shift the nitrogen to phosphorus ratio gradually, which is useful once you know your strain and setup.
Is Emerald Goddess organic? It is an organic-based tonic built on kelp and amino acids, used alongside a mineral base rather than instead of one.
Do I need Sturdy Stalk? If your plants are stretching or struggling to hold weight in late flower, silicon supplementation helps. See the wider silicon range.
Why buy Emerald Harvest from The Hydro Bros?
We stock the Emerald Harvest range in full, ship discreetly across the UK and Europe, and know these products because we use them. With excellent customer reviews on Trustpilot and staff who actually grow, you get the right kit first time.
