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.
Canna Boost Accelerator
Original price was: £23.99 – £359.99Price range: £23.99 through £359.99. Price range: £21.59 through £323.99Current price is: £21.59 – £323.99Price range: £21.59 through £323.99.
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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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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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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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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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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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Field Marshal Flower Bomb
Original price was: £102.99 – £474.99Price range: £102.99 through £474.99. Price range: £92.69 through £427.49Current price is: £92.69 – £427.49Price range: £92.69 through £427.49.
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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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Plant Success Great White
Original price was: £12.99 – £284.99Price range: £12.99 through £284.99. Price range: £11.69 through £256.49Current price is: £11.69 – £256.49Price range: £11.69 through £256.49.
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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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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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This product has multiple variants. The options may be chosen on the product page
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
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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This product has multiple variants. The options may be chosen on the product page
Dutchpro 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
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
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
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
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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House and Garden Shooting Powder 100g
Original price was: £6.99.£6.29Current price is: £6.29.
Green Planet Rezin
Original price was: £21.99 – £299.99Price range: £21.99 through £299.99. Price range: £19.79 through £269.99Current price is: £19.79 – £269.99Price range: £19.79 through £269.99.
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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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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
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
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
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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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
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
Superthrive
Original price was: £12.99 – £549.99Price range: £12.99 through £549.99. Price range: £11.69 through £494.99Current price is: £11.69 – £494.99Price range: £11.69 through £494.99.
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This product has multiple variants. The options may be chosen on the product page
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
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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This product has multiple variants. The options may be chosen on the product page