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.
Evoponic Goliath
Original price was: £21.99 – £219.99.£19.79 – £197.99Current price is: £19.79 – £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.
Ecothrive Soil Food
Original price was: £14.99 – £49.99.£13.49 – £44.99Current price is: £13.49 – £44.99.
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This product has multiple variants. The options may be chosen on the product page
Aptus Mycor Mix 100g
Original price was: £31.99.£28.79Current price is: £28.79.
Advanced Nutrients Ancient Earth 1 Litre
Original price was: £29.99.£26.99Current price is: £26.99.
VitaLink Heat 250ml
Original price was: £24.99.£22.49Current price is: £22.49.
A.R.T.S Terra Bact 1 Litre
Original price was: £29.99.£26.99Current price is: £26.99.
B’Cuzz Silic Boost 1 Litre
Original price was: £179.99.£161.99Current price is: £161.99.
Genesis PK Plus 1 Litre
Original price was: £27.99.£25.19Current price is: £25.19.
DynoMyco Spark 3 in 1 Powder
Original price was: £24.99 – £1,199.99.£22.49 – £1,079.99Current price is: £22.49 – £1,079.99.
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DynoMyco Premium Mycorrhizal Inoculant Granules
Original price was: £15.99 – £799.99.£14.39 – £719.99Current price is: £14.39 – £719.99.
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Green Planet PK Spike 1 Litre
Original price was: £29.99.£26.99Current price is: £26.99.
Fish Sh!t 500ml by Fishhead Farms
Original price was: £64.99.£58.49Current price is: £58.49.
Advanced Nutrients Sensi Cal Mag Xtra 1L
Original price was: £24.99.£22.49Current price is: £22.49.
Advanced Nutrients OG Organics Tasty Terpenes 1L
Original price was: £44.99.£40.49Current price is: £40.49.
British Organics Bio Microbes 1 Litre
Original price was: £59.99.£53.99Current price is: £53.99.
British Organic Bio Organic CalMag 1 Litre
Original price was: £29.99.£26.99Current price is: £26.99.
British Organic Bio Sea Silica 1 Litre
Original price was: £47.99.£43.19Current price is: £43.19.
British Organic Bio Organic Boost 1 Litre
Original price was: £71.99.£64.79Current price is: £64.79.
Plagron PK 13-14
Original price was: £11.99 – £49.99.£10.79 – £44.99Current price is: £10.79 – £44.99.
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Fruit Machine 1 Litre
Original price was: £59.99.£53.99Current price is: £53.99.
GEN200 Control 1 Litre
Original price was: £149.99.£134.99Current price is: £134.99.
Biobizz Leaf Coat
Original price was: £9.99 – £139.99.£8.99 – £125.99Current price is: £8.99 – £125.99.
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Ecothrive Trace
Original price was: £8.99 – £74.99.£8.09 – £67.49Current price is: £8.09 – £67.49.
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Terra Aquatica Seaweed 1L
Original price was: £24.99.£22.49Current price is: £22.49.
Terra Aquatica Silicate 1 Litre
Original price was: £14.99.£13.49Current price is: £13.49.
Ecolizer Root Up
Original price was: £39.99 – £159.99.£35.99 – £159.99Current price is: £35.99 – £159.99.
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House and Garden Stimulator 1
Original price was: £21.99 – £79.99.£19.79 – £71.99Current price is: £19.79 – £71.99.
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Bio Bav Problem Solver
Original price was: £16.99 – £44.99.£15.29 – £40.49Current price is: £15.29 – £40.49.
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Plagron Bat Guano
Original price was: £54.99.£49.49Current price is: £49.49.
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This product has multiple variants. The options may be chosen on the product page
Advanced Nutrients Bud Blood Powder
Original price was: £119.99.£107.99Current price is: £107.99.
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Grow Genius Mono Silicic
Original price was: £39.99 – £79.99.£35.99 – £71.99Current price is: £35.99 – £71.99.
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Bio Nova X-Cel
Original price was: £39.99 – £139.99.£35.99 – £125.99Current price is: £35.99 – £125.99.
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Athena Pro Balance 10lb
Original price was: £117.99.£106.19Current price is: £106.19.
Nature2 Humitine
Original price was: £15.99 – £43.99.£14.39 – £39.59Current price is: £14.39 – £39.59.
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This product has multiple variants. The options may be chosen on the product page
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