1. March 18, 2020


    Green Spirit Hydroponics and COVID-19

    UPDATE: 29/06/2020 - Please read for updated guidance 

    To be updated with any changes to opening hours or the ordering procedure, or anything else happening at Green Spirit, please click the link below and sign up to our newsletter!


    Please be advised that while we have now returned to regular opening hours Monday - Friday, we are unable to open on Saturdays and Sundays at present because of the increased staff required to operate safely and maintain proper social distancing. As soon as we re-open on these days, we will update this page.

    From Monday 4th May, our Sheffield store will be moving to limited opening, with a call or text collection service available for all customers.

    Using the number 07394930143, either give us a call or send a text with your order, and you'll be given a quotation number. We'll then let you know when your order's ready for collection, so you can drive down to the store and pick it up. Once you arrive for your order, please wait in your car and call 07394930143, letting us know your quotation number. A member of staff will be with you as soon as possible to with your order to take payment (customers paying by card will be able to enter the store at this time).

    When you make your order, please do ensure that everything you need is included. If you need to add any items to your order when you come to collect it, we may have to ask you to join the back of the queue in our car park to allow us time to safely get everything together for you. We also ask that where possible, please arrive with the correct change to help us minimise contact.

    We're still working diligently to maintain safe social distancing measures for our staff and customers, and although the store will be open for order collection

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  2. January 10, 2020


    Maxibright Daylight 660W LED - Back In Stock!

    We've now got the Maxibright Daylight 660W LED Light fixture back in stock!

    Act quick, as these have been highly-anticipated and we're already seeing lots of interest.


    • Light distribution optimised for 1.2m x 1.2m area.
    • 8 LED bars for uniform light distribution.
    • Light bars can slide horizontally to allow different spacing interval requirements.
    • Light bars can be tilted through 30° to optimise light spread e.g. at edge of growing area.
    • Dimmable from 30% to 100% power.
    • Optimised spectral output to provide the best light for plant growth, including UV and Far Red.
    • Only quality Osram and Lumileds LEDs used.
    • Passive heat dissipation design (No need for internal cooling fans).
    • Energy Saving and environment friendly. No harmful heavy metals used. High photoelectric conversion efficiency results in less energy resulting in heat and more energy resulting in usable growth light.

    Maxibright Daylight 660W LED Light on Target at 350mm Light on Target at 350mm
    Maxibright Daylight 660W LED Polar Chart Pola
    Read More
  3. December 19, 2019


    Ecothrive and Biobizz Open Day


    To beat the inescapable January blues, we’re putting together an expert open day on 29th January 2020 with two companies we’re incredibly proud to stock. 

    We’ll be visited by Biobizz and Ecothrive on Wednesday 29th January, wherein reps from each company will be available to offer best-use advice on their full range of products, as well as extra information about what actually goes into the products you’re using on your plants. 

    You can expect free samples, expert knowledge from the people who actually make the products you’re using, and a chance to chat to other growers interested in organics and natural alternatives to some of the other additives and nutrients out there. 

    Both Biobizz and Ecothrive care massively about the ingredients, the benefits, and the science behind what they create and sell, and we hope the collaborative open day will be an excellent chance to learn a bit more about how these products can help your grow room to thrive. 

    If you’re not sure if the open day’s for you, here’s a little bit more about the two companies: 


    “Ecothrive offers natural, organic products centred around promoting beneficial soil biology, improving plant health and increasing yields.”

    Ecothrive products are suitable and used b

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  4. November 29, 2019


    Black Friday Savings!

    Black Friday 2019 is here! Over the last decade or so the UK has truly got on board with this event that started in the USA, but this year we wanted to turn the focus onto all the great companies in the hydroponics industry that are based here in the United Kingdom. We've got a list of 13 companies based in the British Isles and you'll get 25% off anything from their range if you purchase today!


    Growers Ark
    Buddha's Tree
    Plant Magic
    Silver Bullet
    Rocket Fuel
    Maxibright (lamps only)
    BHO Hardware 

    Based in Coventry, VitaLink produce nutrients, additives and growing media for hydro, coco coir and soil growing. In the recognisable blue bottle, they cover a range of growing abilities from beginner to professional.

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  5. November 19, 2019


    Botanicare Brand Spotlight

    Botanicare is a leading brand of plant nutrients, additives and supplements, world-renowned for their commitment to the science of plant growth. 

    The original Botanicare product! Here's where it all began. Pure Blend Tea contains all the required components for maximizing both the flavours and the aromas of your plants. You'll find: vitamins, enzymes, amino acids, ultra-soluble humates, fulvic acid and carbohydrates packed inside to give your plants just what they need. The formula is completely water-soluble, and delivers excellent performance in soil and hydroponic gardens.

    Pure Blend Tea

    Meet your plants' metabolic demands through bloom with the Botanicare Sweet range, including Raw, Grape, Citrus and Berry. Sweet is intended to enhance and bring out the natural scents and sweet tastes of your plant, but will not alter or modify these in any way, only strengthen them. This is done by increasing the production of terpenes and essential oils. As with Pure Blend Tea, the Sweet range is water soluble and fine to use with hydroponic systems as well as soil.

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  6. January 15, 2019


    VPD - Vapour Pressure Deficit

    As implied by the word "deficit" we're talking about the difference between the theoretical pressure exerted by water vapour held in saturated air (100% RH at a given temperature) and the pressure exerted by the water vapour that is actually held in the air being measured at the same given temperature.

    In essence, it is the consequence of the imbalance between temperature and relative humidity.

    ⬇︎LOW Humidity + ⬆︎ HIGH Temperature = as air warms it expands and has the ability to hold more water

    ⬆︎HIGH Humidity + ⬇︎LOW Temperature = as air cools and contracts vapour concentrates and can fall or condense out of the air as water

    Temperature control and humidity maintenance are essential for the prevention of VPD. There are several ways to monitor your grow room and ensure these optimal levels (see table) are maintained.

    To learn more about humidity, check out our humidity blog -

    There are several products you can get to manage your humidity levels.

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  7. November 29, 2018



    As the temperatures drop, your plants will need extra warmth. Cold damage is not always easy to spot, and many growers may misdiagnose it as a disease or deficiency. The most common cause is temperatures falling overnight, inflicting mild cold injuries on sensitive plants.

    What happens

    As the lights in your room go off the temperature in you grow room can plummet, this is bad on many levels.

    1  The heat in you room drops significantly and quickly this shocks your plants and can stop them feeding losing yield.  Temperature of your grow room over night or when lights are off is also crucial for when lights go back on, humidity can increase due to the quick increase of temperatures and your plants don’t start feeding straight away as the root ball is so cold this loses you time and yield. 



    2  humidity in your grow room will also shoot up.  If you are in flower when this happens it could give you problems with Botrytis also known as bud rot causing you to lose yield.   

     Plant deficiencies can be mistaken for cold temps, this is a night mare as you could end up spending money on products that you don’t need trying to fix a problem that could be fixed by buying the correct equipment

    Cold Damage Symptoms include:

    • Wilting
    • Leaf curling
    • Discolouration
    • Damaged spots

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  8. October 16, 2018


    How to Clone a Plant

    Shop Rooting Hormones & Propagation additives

    To Clone using Rockwool

    Shop Rockwool now

    To Clone using soil

    Shop Soil now

    To Clone using Water

    To Shop pH management

    Read More
  9. September 18, 2018


    Humidity: the wetter the better?

    Humidity has a huge impact on plant growth, the guttation seen here as droplets on the tips of this leaf are a visible indication of an excessively high (night-time) humidity

    There are many aspects to the environment that you can play a part in controlling. Temperature is usually always the first on people’s minds, we can feel heat so naturally it becomes quite a significant factor to us humanoids. If you hadn’t already guessed from the title of this blog, the second parameter on the hypothetical list should be humidity. The amount of water in the air doesn’t really impact people very much (other than say give us a tickly cough or make us overly sweaty) but for a plant it is a completely different kettle of fish.

    Understanding your humidity means not just understanding humidity on its lonesome though. It is intricately linked to temperature and has multiple impacts on plant growth, so it takes a small amount of getting your head around to properly understand, but once you have the basics it will help you out leaps and bounds down the line.

    So, what is humidity

    Quite simply, it is the amount of water in the air. Strictly speaking, ‘Relative Humidity (RH)’ is what a grower measures though, and by relative we don’t mean uncle dickhead who turns up to ruin Christmas. The ‘relative’ bit is referring to temperature. The warmer the temperature of the air, the more water it can hold. What does this mean though? Well, imagine you had a sealed grow room that was 20°C, with a relative

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  10. June 18, 2018


    Temperature in the Grow Room: Man’s not hot!

    Us humans deal with hot temperatures differently to that of our plant friends

    Temperature is THE most important thing for your indoor grow room. Underestimate temperature issues or do not adequately control your temperature throughout your grow, and you will never achieve the record-breaking yield of your dreams. One or two extra degrees of heat during warm days, too cold a night time temperature, or even too great a swing in your day/night temperature difference all play a direct part in adding to your yield. Getting them right will see more of an addition to your yields than any bottle of nutrient can give you; quick maths.

    Understanding how temperature impacts your plants and understanding how you can steer your growth by controlling grow room temperatures will quickly set you on the path to becoming a hydroponic god. This blog is a quick insight into temperature and a few pointers about the sort of equipment you can use to control it all. So, without further ado, let’s get cracking!

    What temperature does

    There are two key things that temperature impacts a plant with; its metabolic rate and its cooling capacity, which are essentially at constant logger-heads.

    Your plant needs heat to maintain a healthy metabolism. Eve

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