Ecothrive Flourish - Pure Seaweed Extract Biostimulant for Root and Foliar Feed
Best for: Growers who want a stable, reservoir-safe seaweed extract to reduce plant stress and boost growth through propagation, veg and flower.
Our thoughts
This is one of the cleaner seaweed extracts we stock, it's refined enough to stay stable in a reservoir for weeks without fouling, which is where a lot of cheaper seaweed products fall down. Use it as a root feed from cutting stage right through to a couple of weeks before harvest, or as a foliar spray when plants are under stress. Straightforward, well-sourced, does what it says.
Ecothrive Flourish is a concentrated seaweed extract made from Ascophyllum nodosum, harvested from tidal waters off Northwest Scotland and the west coast of Ireland. It's processed using a low-temperature, high-pressure extraction method that preserves the bioactive compounds, phytohormones like auxins, gibberellins and cytokinins, along with polysaccharides and betaines, without needing harsh chemicals.
It's fully soluble and formulated to remain stable in a reservoir for weeks without fouling or blocking drippers, which makes it compatible with soil, coco and hydro systems alike. Growers use it as a root feed at every watering to support growth and reduce stress, or as an occasional foliar spray, particularly useful around transplanting, heat stress, or other environmental pressure on the plant.
How it compares
Seaweed extracts are a well-established biostimulant category, and Flourish is positioned as a premium, reservoir-stable option within it.
- The extra-refined processing gives it longer reservoir stability than many standard seaweed extracts, which can foul or clog drippers over time.
- Performs a similar stress-reduction and growth-support role to House & Garden Roots Excelurator, though via seaweed bioactives rather than that product's specific formulation.
- Comparable in concept to other Ascophyllum nodosum extracts on the market, but marketed specifically for reservoir and hydro compatibility.
If you've had seaweed products cause fouling or blockages in a reservoir before, the extra refinement here is the specific thing that's meant to solve that.
Usage guidance
Flourish can be used two ways, as a root feed or a foliar spray, depending on what your plants need.
Root feed
Apply at 0.25-0.5ml per litre with every watering, from propagation through veg and flower, stopping one to two weeks before harvest.
Foliar spray
Spray at 10ml per litre every 10-14 days during propagation and vegetative growth, continuing through fruiting for fruiting plants, but stopping once flowers begin forming on flowering crops.
Combining with other products
It's tank-stable and compatible with other nutrients and additives, so it can be mixed into your regular feed programme rather than needing a separate application.
Best timing for foliar use
Spray in the cooler part of the day, morning or evening, to reduce leaf stress and improve uptake, particularly useful during heatwaves or after transplanting.
Technical specifications
- Active ingredient: Ascophyllum nodosum seaweed extract
- Format: 100% natural, organic-approved biostimulant
- Compatible media: Soil, coco and hydroponic systems
- Root feed dose: 0.25-0.5ml per litre, every watering
- Foliar spray dose: 10ml per litre, every 10-14 days
- Key bioactives: Phytohormones (auxins, gibberellins, cytokinins), polysaccharides, betaines
- Stability: Formulated to remain stable in reservoir for weeks without fouling
- Source: Hand-harvested from Northwest Scotland and the west coast of Ireland
Who this is for
- Growers wanting a stress-reduction and growth biostimulant that works as both root feed and foliar spray
- Hydro and reservoir-based growers who've had fouling issues with less refined seaweed products
- Organic and living soil growers looking for a natural, organic-approved additive
- Anyone dealing with heat stress, transplant shock or other environmental pressure on their plants
Our take
A clean, well-sourced seaweed extract that does the two jobs it's meant to, reduce stress and support growth, without causing the reservoir problems cheaper extracts sometimes bring. The dual root feed/foliar spray flexibility makes it useful throughout a full grow cycle.
Straightforward to dose and genuinely reservoir-friendly. One we sell a lot of for growers who want a natural biostimulant they can rely on.
