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.
RAW Yucca
Original price was: £31.99 – £1,699.99.£28.79 – £1,529.99Current price is: £28.79 – £1,529.99.
Select options
This product has multiple variants. The options may be chosen on the product page
RAW Enzymes (Tech Grade)
Original price was: £31.99 – £1,669.99.£28.79 – £1,502.99Current price is: £28.79 – £1,502.99.
Select options
This product has multiple variants. The options may be chosen on the product page
RAW Amino Acid(Tech Grade)
Original price was: £24.99 – £1,334.99.£22.49 – £1,201.49Current price is: £22.49 – £1,201.49.
Select options
This product has multiple variants. The options may be chosen on the product page
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.
Select options
This product has multiple variants. The options may be chosen on the product page
Dutchpro Explode
Original price was: £29.99 – £1,099.99.£26.99 – £989.99Current price is: £26.99 – £989.99.
Select options
This product has multiple variants. The options may be chosen on the product page
RAW ominA Amino Acids
Original price was: £21.99 – £899.99.£19.79 – £809.99Current price is: £19.79 – £809.99.
Select options
This product has multiple variants. The options may be chosen on the product page
RAW Full Up
Original price was: £21.99 – £899.99.£19.79 – £809.99Current price is: £19.79 – £809.99.
Select options
This product has multiple variants. The options may be chosen on the product page
RAW B-Vitamin
Original price was: £18.99 – £899.99.£17.09 – £809.99Current price is: £17.09 – £809.99.
Select options
This product has multiple variants. The options may be chosen on the product page
Future Harvest Ton O Bud
Original price was: £24.99 – £899.99.£22.49 – £809.99Current price is: £22.49 – £809.99.
Select options
This product has multiple variants. The options may be chosen on the product page
RAW Bloom Microbes
Original price was: £16.99 – £894.99.£15.29 – £805.49Current price is: £15.29 – £805.49.
Select options
This product has multiple variants. The options may be chosen on the product page
RAW Grow Microbes
Original price was: £16.99 – £894.99.£15.29 – £805.49Current price is: £15.29 – £805.49.
Select options
This product has multiple variants. The options may be chosen on the product page
RAW Silica
Original price was: £16.99 – £849.99.£15.29 – £764.99Current price is: £15.29 – £764.99.
Select options
This product has multiple variants. The options may be chosen on the product page
Veg + Bloom Shine
Original price was: £38.99 – £849.99.£35.09 – £764.99Current price is: £35.09 – £764.99.
Select options
This product has multiple variants. The options may be chosen on the product page
RAW Humic Acid
Original price was: £16.99 – £847.99.£15.29 – £763.19Current price is: £15.29 – £763.19.
Select options
This product has multiple variants. The options may be chosen on the product page
DynoMyco Premium Mycorrhizal Inoculant Granules
Original price was: £15.99 – £799.99.£14.39 – £719.99Current price is: £14.39 – £719.99.
Select options
This product has multiple variants. The options may be chosen on the product page
Rock Resinator
Original price was: £66.99 – £799.99.£60.29 – £719.99Current price is: £60.29 – £719.99.
Select options
This product has multiple variants. The options may be chosen on the product page
Bio Green X-Force Silicium 250ml
Original price was: £49.99 – £724.99.£44.99 – £652.49Current price is: £44.99 – £652.49.
Select options
This product has multiple variants. The options may be chosen on the product page
Veg + Bloom Stax
Original price was: £34.99 – £670.99.£31.49 – £603.89Current price is: £31.49 – £603.89.
Select options
This product has multiple variants. The options may be chosen on the product page
Bio Green X-Blast
Original price was: £99.99 – £649.99.£89.99 – £584.99Current price is: £89.99 – £584.99.
Select options
This product has multiple variants. The options may be chosen on the product page
Mills Vitalize
Original price was: £27.99 – £629.99.£25.19 – £566.99Current price is: £25.19 – £566.99.
Select options
This product has multiple variants. The options may be chosen on the product page
FloraMax Resin-XS
Original price was: £50.99 – £627.99.£45.89 – £565.19Current price is: £45.89 – £565.19.
Select options
This product has multiple variants. The options may be chosen on the product page
House and Garden Roots Excelurator
Original price was: £39.99 – £579.99.£35.99 – £521.99Current price is: £35.99 – £521.99.
Select options
This product has multiple variants. The options may be chosen on the product page
Atami Rokzbastic
Original price was: £55.99 – £549.99.£50.39 – £494.99Current price is: £50.39 – £494.99.
Select options
This product has multiple variants. The options may be chosen on the product page
Superthrive
Original price was: £12.99 – £549.99.£11.69 – £494.99Current price is: £11.69 – £494.99.
Select options
This product has multiple variants. The options may be chosen on the product page
FloraMax OrganaBud
Original price was: £38.99 – £544.99.£35.09 – £490.49Current price is: £35.09 – £490.49.
Select options
This product has multiple variants. The options may be chosen on the product page
Shogun Katana Roots
Original price was: £11.99 – £499.99.£10.79 – £449.99Current price is: £10.79 – £449.99.
Select options
This product has multiple variants. The options may be chosen on the product page
FloraMax Root-XS Root Stimulator
Original price was: £35.99 – £486.99.£32.39 – £438.29Current price is: £32.39 – £438.29.
Select options
This product has multiple variants. The options may be chosen on the product page
RAW Cane Molasses
Original price was: £13.99 – £484.99.£12.59 – £436.49Current price is: £12.59 – £436.49.
Select options
This product has multiple variants. The options may be chosen on the product page
RAW Calcium Magnesium
Original price was: £13.99 – £484.99.£12.59 – £436.49Current price is: £12.59 – £436.49.
Select options
This product has multiple variants. The options may be chosen on the product page
Field Marshal Flower Bomb
Original price was: £106.99 – £474.99.£96.29 – £427.49Current price is: £96.29 – £427.49.
Select options
This product has multiple variants. The options may be chosen on the product page
Atami Bloombastic
Original price was: £46.99 – £449.99.£42.29 – £404.99Current price is: £42.29 – £404.99.
Select options
This product has multiple variants. The options may be chosen on the product page
Emerald Harvest Honey Chome
Original price was: £34.99 – £445.99.£31.49 – £401.39Current price is: £31.49 – £401.39.
Select options
This product has multiple variants. The options may be chosen on the product page
RAW Potassium
Original price was: £10.99 – £419.99.£9.89 – £377.99Current price is: £9.89 – £377.99.
Select options
This product has multiple variants. The options may be chosen on the product page
RAW Phosphorus
Original price was: £10.99 – £419.99.£9.89 – £377.99Current price is: £9.89 – £377.99.
Select options
This product has multiple variants. The options may be chosen on the product page
RAW Nitrogen
Original price was: £10.99 – £419.99.£9.89 – £377.99Current price is: £9.89 – £377.99.
Select options
This product has multiple variants. The options may be chosen on the product page
Plagron Green Sensation
Original price was: £69.99 – £419.99.£62.99 – £377.99Current price is: £62.99 – £377.99.
Select options
This product has multiple variants. The options may be chosen on the product page
GHEDirect LTD, 
