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.
Plagron Calmag Pro
Original price was: £19.99.£17.99Current price is: £17.99.Plagron Calmag Pro
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PLAGRON COCOS
Original price was: £44.99 – £74.99Price range: £44.99 through £74.99. Price range: £40.49 through £67.49Current price is: £40.49 – £67.49Price range: £40.49 through £67.49.PLAGRON COCOS
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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 Terp Booster 1 Litre
Plant Life Nutrients Purp Booster 1 Litre
Original price was: £14.99.£13.49Current price is: £13.49.Plant Life Nutrients Purp Booster 1 Litre
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.Evoponic MotherKare
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Plant Magic Pure Clean 250ml
Original price was: £11.99.£10.79Current price is: £10.79.Plant Magic Pure Clean 250ml
CX Horticulture Bio Balancer
Original price was: £31.99 – £109.99Price range: £31.99 through £109.99. Price range: £28.79 through £98.99Current price is: £28.79 – £98.99Price range: £28.79 through £98.99.CX Horticulture Bio Balancer
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Genesis Pro-Tect 1 Gallon
Original price was: £109.99.£99.00Current price is: £99.00.Genesis Pro-Tect 1 Gallon
Genesis Liquid Sand 1 Gallon
Original price was: £59.99.£53.99Current price is: £53.99.Genesis Liquid Sand 1 Gallon
Genesis P/K Plus 1 Gallon
Original price was: £69.99.£62.99Current price is: £62.99.Genesis P/K Plus 1 Gallon
Hygrozyme Hygroben 4 Litre
Original price was: £149.99.£134.99Current price is: £134.99.Hygrozyme Hygroben 4 Litre
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.RAW Kelp
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RAW Terpz 8.37oz – 237.5g
Original price was: £14.99.£13.49Current price is: £13.49.RAW Terpz 8.37oz – 237.5g
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.GK-Organics Seaweed Powder
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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.Essentials Silicon
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VitaLink Chill 250ml
Original price was: £24.99.£22.49Current price is: £22.49.VitaLink Chill 250ml
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.Evoponic Goliath
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A.R.T.S. Flower Power 1 Litre
Original price was: £94.99.£85.49Current price is: £85.49.A.R.T.S. Flower Power 1 Litre
Ecothrive Soil Food
Original price was: £14.99 – £49.99Price range: £14.99 through £49.99. Price range: £13.49 through £44.99Current price is: £13.49 – £44.99Price range: £13.49 through £44.99.Ecothrive Soil Food
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Aptus Mycor Mix 100g
Original price was: £31.99.£28.79Current price is: £28.79.Aptus Mycor Mix 100g
Advanced Nutrients Ancient Earth 1 Litre
Original price was: £29.99.£26.99Current price is: £26.99.Advanced Nutrients Ancient Earth 1 Litre
A.R.T.S Terra Bact 1 Litre
Original price was: £29.99.£26.99Current price is: £26.99.A.R.T.S Terra Bact 1 Litre
B’Cuzz Silic Boost 1 Litre
Original price was: £179.99.£161.99Current price is: £161.99.B’Cuzz Silic Boost 1 Litre
DynoMyco Spark 3 in 1 Powder
Original price was: £24.99 – £1,199.99Price range: £24.99 through £1,199.99. Price range: £22.49 through £1,079.99Current price is: £22.49 – £1,079.99Price range: £22.49 through £1,079.99.DynoMyco Spark 3 in 1 Powder
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DynoMyco Premium Mycorrhizal Inoculant Granules
Original price was: £15.99 – £799.99Price range: £15.99 through £799.99. Price range: £14.39 through £719.99Current price is: £14.39 – £719.99Price range: £14.39 through £719.99.DynoMyco Premium Mycorrhizal Inoculant Granules
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Green Planet PK Spike 1 Litre
Original price was: £29.99.£26.99Current price is: £26.99.Green Planet PK Spike 1 Litre
Fish Sh!t 500ml by Fishhead Farms
Original price was: £64.99.£58.49Current price is: £58.49.Fish Sh!t 500ml by Fishhead Farms
Advanced Nutrients Sensi Cal Mag Xtra 1L
Original price was: £24.99.£22.49Current price is: £22.49.Advanced Nutrients Sensi Cal Mag Xtra 1L
Advanced Nutrients OG Organics Tasty Terpenes 1L
Original price was: £44.99.£40.49Current price is: £40.49.Advanced Nutrients OG Organics Tasty Terpenes 1L
British Organics Bio Microbes 1 Litre
Original price was: £59.99.£53.99Current price is: £53.99.British Organics Bio Microbes 1 Litre
British Organic Bio Organic CalMag 1 Litre
Original price was: £29.99.£26.99Current price is: £26.99.British Organic Bio Organic CalMag 1 Litre
British Organic Bio Sea Silica 1 Litre
Original price was: £47.99.£43.19Current price is: £43.19.British Organic Bio Sea Silica 1 Litre
British Organic Bio Organic Boost 1 Litre
Original price was: £71.99.£64.79Current price is: £64.79.British Organic Bio Organic Boost 1 Litre
Plagron PK 13-14
Original price was: £11.99 – £49.99Price range: £11.99 through £49.99. Price range: £10.79 through £44.99Current price is: £10.79 – £44.99Price range: £10.79 through £44.99.Plagron PK 13-14
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Fruit Machine 1 Litre
Original price was: £59.99.£53.99Current price is: £53.99.Fruit Machine 1 Litre