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.
Vitalink Foliar 5 Litre
Original price was: £69.99.£62.99Current price is: £62.99.
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Dutch Pro Quantum Massive Powdershot
Original price was: £13.99 – £44.99Price range: £13.99 through £44.99. Price range: £12.59 through £40.49Current price is: £12.59 – £40.49Price range: £12.59 through £40.49.
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This product has multiple variants. The options may be chosen on the product page
Canna Bio Rhizotonic
Original price was: £12.99 – £29.99Price range: £12.99 through £29.99. Price range: £11.69 through £26.99Current price is: £11.69 – £26.99Price range: £11.69 through £26.99.
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This product has multiple variants. The options may be chosen on the product page
Canna Bio Boost
Original price was: £19.99 – £49.99Price range: £19.99 through £49.99. Price range: £17.99 through £44.99Current price is: £17.99 – £44.99Price range: £17.99 through £44.99.
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Bio Green Lime 5KG
Original price was: £18.99.£17.09Current price is: £17.09.
Mammoth P by Growcentia
Original price was: £79.99 – £189.99Price range: £79.99 through £189.99. Price range: £71.99 through £170.99Current price is: £71.99 – £170.99Price range: £71.99 through £170.99.
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This product has multiple variants. The options may be chosen on the product page
Intense Nutrients Fem Guard
Original price was: £24.99 – £99.99Price range: £24.99 through £99.99. Price range: £22.49 through £89.99Current price is: £22.49 – £89.99Price range: £22.49 through £89.99.
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Diamond Density
Original price was: £39.99 – £119.99Price range: £39.99 through £119.99. Price range: £35.99 through £107.99Current price is: £35.99 – £107.99Price range: £35.99 through £107.99.
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This product has multiple variants. The options may be chosen on the product page
FloraMax Growth-XS
Original price was: £95.99 – £249.99Price range: £95.99 through £249.99. Price range: £86.39 through £224.99Current price is: £86.39 – £224.99Price range: £86.39 through £224.99.
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Density Weight Finisher 5 Litre
Original price was: £199.99.£179.99Current price is: £179.99.
Plagron Pure Zym
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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Plant Magic Water Soluble Mycorrhizal
Original price was: £26.99 – £113.99Price range: £26.99 through £113.99. Price range: £24.29 through £102.59Current price is: £24.29 – £102.59Price range: £24.29 through £102.59.
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Grow Genius Water Genius 100ml
Original price was: £24.99.£22.49Current price is: £22.49.
Fish Sh!t – Organic Soil Conditioner
Original price was: £64.99 – £119.99Price range: £64.99 through £119.99. Price range: £58.49 through £107.99Current price is: £58.49 – £107.99Price range: £58.49 through £107.99.
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This product has multiple variants. The options may be chosen on the product page
Atami ATA Clean
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
Field Marshall Bliss Bud 5 Litre
Original price was: £149.99.£134.99Current price is: £134.99.
Super Boost Foliar Spray
Original price was: £26.99 – £65.99Price range: £26.99 through £65.99. Price range: £24.29 through £59.39Current price is: £24.29 – £59.39Price range: £24.29 through £59.39.
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This product has multiple variants. The options may be chosen on the product page
New Millenium Winter Frost
Original price was: £49.99 – £154.99Price range: £49.99 through £154.99. Price range: £44.99 through £139.99Current price is: £44.99 – £139.99Price range: £44.99 through £139.99.
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This product has multiple variants. The options may be chosen on the product page
New Millenium Ruby Ful#$% 1 Litre
Original price was: £29.99.£26.99Current price is: £26.99.
Plagron Calmag Pro
Original price was: £19.99.£17.99Current price is: £17.99.
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Plant Life Nutrients Terp Booster 1 Litre
Original price was: £14.99.£13.49Current price is: £13.49.
Plant Life Nutrients Purp Booster 1 Litre
Original price was: £14.99.£13.49Current price is: £13.49.
Evoponic MotherKare
Original price was: £59.99 – £179.99Price range: £59.99 through £179.99. Price range: £53.99 through £161.99Current price is: £53.99 – £161.99Price range: £53.99 through £161.99.
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Plant Magic Pure Clean 250ml
Original price was: £11.99.£10.79Current price is: £10.79.
CX Horticulture Bio Balancer
Original price was: £31.99 – £119.99Price range: £31.99 through £119.99. Price range: £28.79 through £107.99Current price is: £28.79 – £107.99Price range: £28.79 through £107.99.
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Genesis Pro-Tect 1 Gallon
Original price was: £109.99.£99.00Current price is: £99.00.
Genesis P/K Plus 1 Gallon
Original price was: £69.99.£62.99Current price is: £62.99.
Hygrozyme Hygroben 4 Litre
Original price was: £149.99.£134.99Current price is: £134.99.
RAW Kelp
Original price was: £18.99 – £239.99Price range: £18.99 through £239.99. Price range: £17.09 through £215.99Current price is: £17.09 – £215.99Price range: £17.09 through £215.99.
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RAW Terpz 8.37oz – 237.5g
Original price was: £14.99.£13.49Current price is: £13.49.
GK-Organics Seaweed Powder
Original price was: £21.99 – £69.99Price range: £21.99 through £69.99. Price range: £19.79 through £62.99Current price is: £19.79 – £62.99Price range: £19.79 through £62.99.
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This product has multiple variants. The options may be chosen on the product page
GK-Organics Veg Pearls 1 Litre
Original price was: £11.99.£10.79Current price is: £10.79.
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Essentials Silicon
Original price was: £10.99 – £27.99Price range: £10.99 through £27.99. Price range: £9.89 through £25.19Current price is: £9.89 – £25.19Price range: £9.89 through £25.19.
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This product has multiple variants. The options may be chosen on the product page
VitaLink Chill 250ml
Original price was: £24.99.£22.49Current price is: £22.49.
Evoponic Goliath
Original price was: £21.99 – £219.99Price range: £21.99 through £219.99. Price range: £19.79 through £197.99Current price is: £19.79 – £197.99Price range: £19.79 through £197.99.
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This product has multiple variants. The options may be chosen on the product page
A.R.T.S. Flower Power 1 Litre
Original price was: £94.99.£85.49Current price is: £85.49.