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.
Dutchpro Explode
Original price was: £29.99 – £1,099.99Price range: £29.99 through £1,099.99. Price range: £26.99 through £989.99Current price is: £26.99 – £989.99Price range: £26.99 through £989.99.
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Canna Boost Accelerator
Original price was: £23.99 – £369.99Price range: £23.99 through £369.99. Price range: £21.59 through £332.99Current price is: £21.59 – £332.99Price range: £21.59 through £332.99.
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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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Canna Rhizotonic
Original price was: £13.99 – £219.99Price range: £13.99 through £219.99. Price range: £12.59 through £197.99Current price is: £12.59 – £197.99Price range: £12.59 through £197.99.
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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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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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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
Great White by Plant Success
Original price was: £12.99 – £59.99Price range: £12.99 through £59.99. Price range: £11.69 through £53.99Current price is: £11.69 – £53.99Price range: £11.69 through £53.99.
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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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Bio Bizz Bio Heaven
Original price was: £21.99 – £389.99Price range: £21.99 through £389.99. Price range: £19.79 through £350.99Current price is: £19.79 – £350.99Price range: £19.79 through £350.99.
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Field Marshal Flower Bomb
Original price was: £106.99 – £474.99Price range: £106.99 through £474.99. Price range: £96.29 through £427.49Current price is: £96.29 – £427.49Price range: £96.29 through £427.49.
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Canna Calmag Agent
Original price was: £14.99 – £59.99Price range: £14.99 through £59.99. Price range: £13.49 through £53.99Current price is: £13.49 – £53.99Price range: £13.49 through £53.99.
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House and Garden Shooting Powder 100g
Original price was: £6.99.£6.29Current price is: £6.29.
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
Shogun Cal Mag
Original price was: £7.99 – £159.99Price range: £7.99 through £159.99. Price range: £7.19 through £143.99Current price is: £7.19 – £143.99Price range: £7.19 through £143.99.
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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 – £104.99Price range: £4.99 through £104.99. Price range: £4.49 through £94.49Current price is: £4.49 – £94.49Price range: £4.49 through £94.49.
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Biosys – Instant Microbe Tea
Original price was: £11.99 – £149.99Price range: £11.99 through £149.99. Price range: £10.79 through £134.99Current price is: £10.79 – £134.99Price range: £10.79 through £134.99.
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Plagron Mega Worm
Original price was: £12.99 – £13.99Price range: £12.99 through £13.99. Price range: £11.69 through £12.59Current price is: £11.69 – £12.59Price range: £11.69 through £12.59.
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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
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
Ecothrive Charge
Original price was: £21.99 – £32.99Price range: £21.99 through £32.99. Price range: £19.79 through £29.69Current price is: £19.79 – £29.69Price range: £19.79 through £29.69.
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This product has multiple variants. The options may be chosen on the product page
Dutch Pro CalMag
Original price was: £19.99 – £89.99Price range: £19.99 through £89.99. Price range: £17.99 through £80.99Current price is: £17.99 – £80.99Price range: £17.99 through £80.99.
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This product has multiple variants. The options may be chosen on the product page
Dutchpro Take Root
Original price was: £19.99 – £349.99Price range: £19.99 through £349.99. Price range: £17.99 through £314.99Current price is: £17.99 – £314.99Price range: £17.99 through £314.99.
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This product has multiple variants. The options may be chosen on the product page
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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Alien Root Rot X
Original price was: £19.99 – £69.99Price range: £19.99 through £69.99. Price range: £17.99 through £62.99Current price is: £17.99 – £62.99Price range: £17.99 through £62.99.
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Advanced Nutrients Big Bud
Original price was: £11.99 – £264.99Price range: £11.99 through £264.99. Price range: £10.79 through £238.49Current price is: £10.79 – £238.49Price range: £10.79 through £238.49.
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Advanced Nutrients Overdrive
Original price was: £11.99 – £229.99Price range: £11.99 through £229.99. Price range: £10.79 through £206.99Current price is: £10.79 – £206.99Price range: £10.79 through £206.99.
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This product has multiple variants. The options may be chosen on the product page
Shogun Sumo Boost Active
Original price was: £14.99 – £419.99Price range: £14.99 through £419.99. Price range: £13.49 through £377.99Current price is: £13.49 – £377.99Price range: £13.49 through £377.99.
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This product has multiple variants. The options may be chosen on the product page
Green Planet Rezin
Original price was: £19.99 – £299.99Price range: £19.99 through £299.99. Price range: £17.99 through £269.99Current price is: £17.99 – £269.99Price range: £17.99 through £269.99.
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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
Shogun Sumo Boost
Original price was: £14.99 – £419.99Price range: £14.99 through £419.99. Price range: £13.49 through £377.99Current price is: £13.49 – £377.99Price range: £13.49 through £377.99.
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This product has multiple variants. The options may be chosen on the product page
Plant Magic Evolution 2.0 Foliar Spray
Original price was: £10.99 – £59.99Price range: £10.99 through £59.99. Price range: £9.89 through £53.99Current price is: £9.89 – £53.99Price range: £9.89 through £53.99.
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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
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
Buddhas Tree PK 9-18
Original price was: £14.99 – £299.99Price range: £14.99 through £299.99. Price range: £13.49 through £269.99Current price is: £13.49 – £269.99Price range: £13.49 through £269.99.
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This product has multiple variants. The options may be chosen on the product page
Xtreme Gardening Mykos
Original price was: £24.99 – £39.99Price range: £24.99 through £39.99. Price range: £22.49 through £35.99Current price is: £22.49 – £35.99Price range: £22.49 through £35.99.
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This product has multiple variants. The options may be chosen on the product page
GHEDirect LTD, 
