Flourish - Concentrated Seaweed Extract Plant Food
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🌿 Packed with care in Bristol, UK
⭐ Loved by thousands of happy Sprouts customers
📦 Royal Mail Tracked delivery
💚 Independent & Real Living Wage Employer
If your plant arrives damaged or unhappy, we’ll put it right. Find out more here
Every plant is carefully packed by our small, plant-loving Bristol team using protective, mostly plastic-free packaging.
Occasionally, you may find reused bubble wrap – this has been donated to us, and we encourage you to reuse it too.
Orders are usually packed and dispatched within 2–4 working days. We may occasionally delay dispatch during periods of extreme weather to protect your plants. We always prioritise plant health over speed of delivery.
Delivery is £4.99 for any number of items, or free on orders over £60. We deliver across the UK only.
We also offer local, bike-powered delivery in Bristol for £4.99 via Pedal Collective, a gentler option for plants and the planet.
We believe in paying people fairly, that’s why we’ve been a Real Living Wage Employer from the very beginning. We’re an independent Bristol business, packing every order ourselves.
Supporting us means supporting fair work.
Questions before ordering? Just drop us a message – we’re always happy to help.
Head to our contact page and fill in the contact form and one of the team will be in touch shortly
The Power of Purity
Brimming with bioactive compounds and phytohormones, flourish reduces stress, improves plant growth, and unleashes bloom potential. Boost germination rates, enhance vegetative vigour, and witness stunning flower development.
- 100% Natural and Organic Approved Biostimulant
- Extra-Refined: Remains Stable in Reservoir for Weeks
- Reservoir Ready: Compatible with Soil, Coco, and Hydro
- Keeps Your Plants Thriving by Increasing Stress Tolerance
- Enhances Germination Rates
- Boosts Vegetative Vigour
- Improves Flower Development
- Root feed or Foliar Spray
Delivering Biological Benefits to All Growers
The bioactive compounds in seaweed extracts offer plants myriad benefits such as increased nutrient uptake, elevated environmental stress tolerance, protection from pathogens, improved growth response, and enhanced fruit and flower development. Contrary to popular belief, pure seaweed extracts are not fertilisers because they actually contain very low quantities of nitrogen, phosphorus, and potassium. Seaweed is often misreported as a good source of trace elements. However, it's the bioactive compounds in seaweed that are responsible for its growth-enhancing effects.
Key bioactive compounds include:
Phytohormones
These plant hormones coordinate cellular activities, leading to improved growth characteristics like increased shoot and root growth, flower numbers, fruit and bud set, increased chlorophyll content, and yield increase. Cytokinins, auxins, and gibberellins are some of the major phytohormone components in seaweed extracts.
Polysaccharides
These compounds in seaweed extracts can enhance plant resistance to a wide range of stressors, including biotic factors like pests and disease. Alginic acid, a polysaccharide found in seaweed, can induce changes in gene regulation with key implications for plant defence mechanisms. Other polysaccharides found in seaweed include laminarin, fucoidan, and mannitol.
Betaines
Found in seaweed, these modified amino acids help protect the plant against environmental stresses such as drought, salinity, heat, and cold stress.
How to Use flourish
Unlike traditional seaweed extracts, flourish is clean and pure enough for use in all growing situations, from organic living soil to hydroponic reservoirs. Through our proprietary processing technique, we've created a unique, ultra-purified extract. Experience a clean, fully soluble, and highly stable seaweed extract that remains fresh in your hydroponic system for weeks - no fouling, no blockages, just steady support for your plants—even in the most demanding growing conditions.
Root Feed
Apply 0.25-0.5ml per litre with every watering.
Can be applied as a stand-alone feed or mixed with other nutrients and additives as part of your regular nutrient program. It is tank stable and highly compatible with other products.
Foliar Feed
Spray 10ml per litre every 10-14 days.
Works excellently as a foliar spray, particularly during key growth stages such as on new clones to promote roots, at transplant to avoid shock, during transitional growth stages between vegetative and fruiting/flower, and to protect from environmental stress. Spray on a regular 10-14 day regime.
As a root feed, flourish is suitable for use in all growth stages. It works great as a seed soak, cube soak, and all-round propagation aid, providing young plants and seedlings with a bioactive boost when they need it most. Continue to use flourish when transplanting into a fresh substrate to help your plants cope with transplant shock and encourage explosive root growth. Once you have repotted, continue using flourish throughout the vegetative and flowering growth phases. You can stop using flourish as a root feed one or two weeks before harvest.
As a foliar feed, flourish can be used throughout propagation and vegetative growth. If you're growing fruiting plants, flourish can be sprayed throughout the cycle right up to harvest. For flowering plants, stop foliar sprays once the flowers have started to form.
Ideal for High Intensity Cultivation Environments
Growing with LEDs? flourish is your go-to solution to overcome the challenges of higher air temperatures, faster wet/dry cycles, and intense LED lighting. Thrive through every growth stage, from seedling to harvest, and enjoy a garden that truly wins, not just making it to the finish line.
flourish can be used throughout the plant’s lifecycle, it delivers a natural boost from seedling or cutting, right through to harvest. Whether you’re growing in living soil, rockwool or deep-water culture, flourish helps your plants to focus on thriving, not just surviving.
Sourced from Pristine Waters
flourish is derived from the renowned seaweed species, Ascophyllum nodosum, hand-harvested from the clean tidal waters of Northwest Scotland and the West Coast of Ireland. Our commitment to sustainability means that every batch is extracted without harmful chemicals, ensuring the highest quality bioactive compounds that nature intended.
Seaweed vs Seaweed Extracts
Throughout history, seaweed has been an essential ally to farmers and growers. Its incorporation as dried seaweed meal into the soil or growing media yields numerous benefits, such as enhancing soil microbial activity, elevating potassium levels, enriching organic matter, and improving water retention. However, this traditional approach may take longer to yield growth-enhancing results.
Yet, it's essential to be mindful of seaweed's salt content when adding it to your soil. At Ecothrive, we conduct rigorous tests on every seaweed batch we receive, typically containing 2-5% sodium, ensuring that potential issues are skillfully sidestepped.
While seaweed incorporation in the soil has its merits, achieving robust growth responses often necessitates the addition of significant quantities, resulting in not only higher application cost but also disruption to soil fertility. That's why, since the 1950s, a more preferred and efficient method involves employing concentrated seaweed extracts as a foliar spray or through drip irrigation. This approach elicits rapid but long-lasting plant responses.
A Superior Seaweed Extract
The extraction method plays a crucial role in the quality of seaweed extracts, determining the abundance of bioactive compounds harvested. Most commonly, the aggressive liquid potassium hydroxide is used in the extraction process, leading to an alkaline mush of seaweed, later filtered to produce the extract. These conventional extracts are high in potassium, which can disrupt water pH once diluted, and often lack the desired compounds for optimal plant stimulation.
Here's where flourish stands apart. Our innovative approach involves maintaining low temperature and high pressure during extraction, effectively squeezing the goodness out of the seaweed biomass. This results in a rich, wide-spectrum extract teeming with phytohormones and bioactive compounds, all achieved without any chemicals. As a final step, we meticulously remove any remaining solids from the extract. Unlike most seaweed extracts available today, flourish undergoes advanced filtration, ensuring that no residual solids disrupt your irrigation systems, spoil reservoirs, or leave unwanted residues on your precious plants' leaves.
We have created the industry’s most stable and fully soluble seaweed extract, complete with a perfectly balanced pH. This means that you can add flourish to your water or nutrient mixes without worrying about compatibility issues. Whether for foliar applications, hydro systems, organic soil, or coco coir, flourish is the ultimate natural plant biostimulant and stress-reliever.
Typical Analysis
| Elements | ||
| Nitrogen | 0 | % |
| Phosphorus | 0 | % |
| Potassium | 0.5 | % |
| Sodium | 0.13 | % |
| Calcium | 600 | mg/kg (ppm) |
| Magnesium | 325 | mg/kg (ppm) |
| Sulphur | 750 | mg/kg (ppm) |
| Boron | 11.5 | mg/kg (ppm) |
| Copper | 3 | mg/kg (ppm) |
| Zinc | 0.1 | mg/kg (ppm) |
| Iron | 4.5 | mg/kg (ppm) |
| Manganese | 2.5 | mg/kg (ppm) |
| Molybdenum | 0.1 | mg/kg (ppm) |
| Bioactive compounds | ||
| Alginic Acid | 4.125 | g/100ml |
| Laminarin | 1.12 | g/100ml |
| Fucoidan | 1.19 | g/100ml |
| Mannitol | 0.44 | g/100ml |
| Betaines | 36 | mg/100ml |
| Auxins | 10 | mg/100ml |
| Gibberellins | 5 | mg/100ml |
| Cytokinin’s | 10 | mg/100ml |
| Heavy Metals | ||
| Arsenic | 1.55 | mg/kg (ppm) |
| Cadmium | <0.1 | mg/kg (ppm) |
| Chromium | <0.1 | mg/kg (ppm) |
| Lead | <0.2 | mg/kg (ppm) |
| Mercury | 0.95 | mg/kg (ppm) |
| Nickel | 0.06 | mg/kg (ppm) |
| Other Parameters | ||
| Seaweed Solids | 3-4% | w/v |
| Organic matter | 2.5 | % |
| pH | 4.2 | |
Let customers speak for us
from 2076 reviews
It was a cork just as ordered
Such a pretty little plant. It has a stunning colour ❤️
Gorgeous little fern ❤️
This is one impressive plant. Strong and sturdy. Stunning to look at. Love it.
Beautiful pot absolutely beautiful
Stunning pot packed perfectly delivered with care 10/10
Perfect plant delivered with care fantastic addition to my collection 🫶
Another perfect plant friend 🙌fantastic quality 10/10 costumer care
Absolutely love this fabulous quality and looks amazing
Fabulous quality,packed perfectly,🫶
Beautiful little fern. Lush and healthy colour. Expertly packed and arrived safely.
Loved my Zygo, very happy and healthy plant in bloom, definitely ordering again from Sprouts of Bristol more
Cute plant packaged well. Good communication on delays
Really nice little plant that goes perfectly with the tulip pots!
Beautiful healthy plant. The only thing that I would suggest would be to improve the packaging. There was no label on the box indicating that there was a live plant inside, and the soil had gone all over the place inside the box. Other than that, I am happy with my little fern.
What customers think about the store
Specializes in healthy plants, terrariums, pots, and seasonal items. Customers praise excellent packaging, fast delivery, and helpful staff. Plants arrive in great condition with care instructions. Wide selection of unique houseplants, cacti, and foliage. Resp... Specializes in healthy plants, terrariums, pots, and seasonal items. Customers praise excellent packaging, fast delivery, and helpful staff. Plants arrive in great condition with care instructions. Wide selection of unique houseplants, cacti, and foliage. Responsive customer service handles issues promptly. Popular for Christmas trees and wreaths.
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