Additives
At The Greenhouse Effect we stock a large selection of additives and nutrients for hydroponic gardening.
If you need any help please call us on 01908 585 283, our highly knowledgeable staff will be happy to assist you.
Growth Technology Formulex
Original price was: £4.99 – £76.99Price range: £4.99 through £76.99. Price range: £4.49 through £69.29Current price is: £4.49 – £69.29Price range: £4.49 through £69.29.
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This product has multiple variants. The options may be chosen on the product page
Bio Bizz Fish Mix
Original price was: £4.99 – £119.99Price range: £4.99 through £119.99. Price range: £4.49 through £107.99Current price is: £4.49 – £107.99Price range: £4.49 through £107.99.
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This product has multiple variants. The options may be chosen on the product page
Canna PK 13/14
Original price was: £4.99 – £47.99Price range: £4.99 through £47.99. Price range: £4.49 through £43.19Current price is: £4.49 – £43.19Price range: £4.49 through £43.19.
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This product has multiple variants. The options may be chosen on the product page
Bio Bizz Calmag
Original price was: £4.99 – £99.99Price range: £4.99 through £99.99. Price range: £4.49 through £89.99Current price is: £4.49 – £89.99Price range: £4.49 through £89.99.
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Plant Magic Boosting Powder
Original price was: £4.99.£4.49Current price is: £4.49.
Bio Bizz Alg-A-Mic
Original price was: £5.99 – £219.99Price range: £5.99 through £219.99. Price range: £5.39 through £197.99Current price is: £5.39 – £197.99Price range: £5.39 through £197.99.
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This product has multiple variants. The options may be chosen on the product page
Shogun Silicon
Original price was: £5.99 – £159.99Price range: £5.99 through £159.99. Price range: £5.39 through £143.99Current price is: £5.39 – £143.99Price range: £5.39 through £143.99.
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This product has multiple variants. The options may be chosen on the product page
Terra Aquatica FinalPart
Original price was: £5.99 – £54.99Price range: £5.99 through £54.99. Price range: £5.39 through £49.49Current price is: £5.39 – £49.49Price range: £5.39 through £49.49.
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This product has multiple variants. The options may be chosen on the product page
Ecothrive Neutralise
Original price was: £5.99 – £179.99Price range: £5.99 through £179.99. Price range: £5.39 through £161.99Current price is: £5.39 – £161.99Price range: £5.39 through £161.99.
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House and Garden Shooting Powder 100g
Original price was: £6.99.£6.29Current price is: £6.29.
Bio Bizz Acti Vera
Original price was: £6.99 – £99.99Price range: £6.99 through £99.99. Price range: £6.29 through £89.99Current price is: £6.29 – £89.99Price range: £6.29 through £89.99.
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This product has multiple variants. The options may be chosen on the product page
Ecothrive Charge
Original price was: £6.99 – £32.99Price range: £6.99 through £32.99. Price range: £6.29 through £29.69Current price is: £6.29 – £29.69Price range: £6.29 through £29.69.
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This product has multiple variants. The options may be chosen on the product page
Shogun Cal Mag
Original price was: £6.99 – £159.99Price range: £6.99 through £159.99. Price range: £6.29 through £143.99Current price is: £6.29 – £143.99Price range: £6.29 through £143.99.
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This product has multiple variants. The options may be chosen on the product page
Bio Green Flower Boost
Original price was: £6.99 – £34.99Price range: £6.99 through £34.99. Price range: £6.29 through £31.49Current price is: £6.29 – £31.49Price range: £6.29 through £31.49.
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This product has multiple variants. The options may be chosen on the product page
Clonex Pro Start
Original price was: £6.99 – £15.99Price range: £6.99 through £15.99. Price range: £6.29 through £14.39Current price is: £6.29 – £14.39Price range: £6.29 through £14.39.
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This product has multiple variants. The options may be chosen on the product page
Advanced Nutrients Flawless Finish
Original price was: £6.99 – £89.99Price range: £6.99 through £89.99. Price range: £6.29 through £80.99Current price is: £6.29 – £80.99Price range: £6.29 through £80.99.
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This product has multiple variants. The options may be chosen on the product page
Advanced Nutrients Liquid CarboLoad
Original price was: £7.99 – £89.99Price range: £7.99 through £89.99. Price range: £7.19 through £80.99Current price is: £7.19 – £80.99Price range: £7.19 through £80.99.
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This product has multiple variants. The options may be chosen on the product page
Canna Cannazym
Original price was: £7.99 – £129.99Price range: £7.99 through £129.99. Price range: £7.19 through £116.99Current price is: £7.19 – £116.99Price range: £7.19 through £116.99.
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Shogun PK Warrior 9/18
Original price was: £7.99 – £304.99Price range: £7.99 through £304.99. Price range: £7.19 through £274.49Current price is: £7.19 – £274.49Price range: £7.19 through £274.49.
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This product has multiple variants. The options may be chosen on the product page
Hy-Gen Budlink
Original price was: £7.99 – £199.99Price range: £7.99 through £199.99. Price range: £7.19 through £179.99Current price is: £7.19 – £179.99Price range: £7.19 through £179.99.
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This product has multiple variants. The options may be chosen on the product page
Dutchpro Leaf Green
Original price was: £7.99 – £49.99Price range: £7.99 through £49.99. Price range: £7.19 through £44.99Current price is: £7.19 – £44.99Price range: £7.19 through £44.99.
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This product has multiple variants. The options may be chosen on the product page
House and Garden PK13-14
Original price was: £7.99 – £49.99Price range: £7.99 through £49.99. Price range: £7.19 through £44.99Current price is: £7.19 – £44.99Price range: £7.19 through £44.99.
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This product has multiple variants. The options may be chosen on the product page
Growth Technology Liquid Oxygen (Oxy-Plus)
Original price was: £8.99 – £29.99Price range: £8.99 through £29.99. Price range: £8.09 through £26.99Current price is: £8.09 – £26.99Price range: £8.09 through £26.99.
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This product has multiple variants. The options may be chosen on the product page
Bio Bizz Top Max
Original price was: £8.99 – £349.99Price range: £8.99 through £349.99. Price range: £8.09 through £314.99Current price is: £8.09 – £314.99Price range: £8.09 through £314.99.
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This product has multiple variants. The options may be chosen on the product page
Vitalink Buddy
Original price was: £8.99 – £64.99Price range: £8.99 through £64.99. Price range: £8.09 through £58.49Current price is: £8.09 – £58.49Price range: £8.09 through £58.49.
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This product has multiple variants. The options may be chosen on the product page
Shogun Zenzym
Original price was: £8.99 – £324.99Price range: £8.99 through £324.99. Price range: £8.09 through £292.49Current price is: £8.09 – £292.49Price range: £8.09 through £292.49.
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This product has multiple variants. The options may be chosen on the product page
Ecothrive Flourish
Original price was: £8.99 – £74.99Price range: £8.99 through £74.99. Price range: £8.09 through £67.49Current price is: £8.09 – £67.49Price range: £8.09 through £67.49.
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This product has multiple variants. The options may be chosen on the product page
Ecothrive Trace
Original price was: £8.99 – £74.99Price range: £8.99 through £74.99. Price range: £8.09 through £67.49Current price is: £8.09 – £67.49Price range: £8.09 through £67.49.
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This product has multiple variants. The options may be chosen on the product page
Advanced Nutrients Sensizym
Original price was: £9.99 – £146.99Price range: £9.99 through £146.99. Price range: £8.99 through £132.29Current price is: £8.99 – £132.29Price range: £8.99 through £132.29.
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This product has multiple variants. The options may be chosen on the product page
House and Garden Top Booster
Original price was: £9.99 – £59.99Price range: £9.99 through £59.99. Price range: £8.99 through £53.99Current price is: £8.99 – £53.99Price range: £8.99 through £53.99.
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This product has multiple variants. The options may be chosen on the product page
Advanced Nutrients Revive – Plant Health Booster
Original price was: £9.99 – £129.99Price range: £9.99 through £129.99. Price range: £8.99 through £116.99Current price is: £8.99 – £116.99Price range: £8.99 through £116.99.
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This product has multiple variants. The options may be chosen on the product page
Plant Success Liquid Orca
Original price was: £9.99 – £62.99Price range: £9.99 through £62.99. Price range: £8.99 through £56.69Current price is: £8.99 – £56.69Price range: £8.99 through £56.69.
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This product has multiple variants. The options may be chosen on the product page
Dutchpro Keep It Clean
Original price was: £9.99 – £279.99Price range: £9.99 through £279.99. Price range: £8.99 through £251.99Current price is: £8.99 – £251.99Price range: £8.99 through £251.99.
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This product has multiple variants. The options may be chosen on the product page
Shogun Geisha Foliar Spray
Original price was: £9.99 – £69.99Price range: £9.99 through £69.99. Price range: £8.99 through £62.99Current price is: £8.99 – £62.99Price range: £8.99 through £62.99.
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This product has multiple variants. The options may be chosen on the product page
Dutchpro Multi Total
Original price was: £9.99 – £189.99Price range: £9.99 through £189.99. Price range: £8.99 through £170.99Current price is: £8.99 – £170.99Price range: £8.99 through £170.99.
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This product has multiple variants. The options may be chosen on the product page
Shogun Dragon Force
Original price was: £9.99 – £189.99Price range: £9.99 through £189.99. Price range: £8.99 through £170.99Current price is: £8.99 – £170.99Price range: £8.99 through £170.99.
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This product has multiple variants. The options may be chosen on the product page