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Nutrients & Supplements

Soil Amendments
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128
Grotek Gro-Silic, 4 L
In Stock: 989
$8.86 $232.99 -96%
Roots Organics Buddha Bloom, 1 qt
Out of stock
$8.80 $24.93 -65%
Grotek Pro-Silicate, 1 L
In Stock: 527
$8.65 $15.71 -45%
FoxFarm Cultivation Nation Cal-Mag | 16oz
In Stock: 84
$8.63 $12.99 -34%
Gaia Green Power Bloom, 500 g Pouch
In Stock: 58
$8.61 $10.98 -22%
Aptus Massboost, 100 ml
In Stock: 147
$8.54 $26.50 -68%
Grotek Solo-Tek Bloom 3-8-8 | 500mL - (Case of 6)
In Stock: 12
$8.50 $16.29 -48%
Remo Grow, 1 L
In Stock: 8
$8.26 $20.99 -61%
Sustane 4-6-4 Flower & Vegetable Plant Food | 5lb - OMRI Listed - (Case of 8)
In Stock: 24
$8.24 $11.79 -30%
Grotek Gro-Silic, 500 ml
In Stock: 283
$8.24 $51.99 -84%
True Organic Prilled Sulfur | 5lb - Resealable Bag - Lowers Soil pH - Covers up to 1,333sq ft - OMRI Listed - (Case of 6)
In Stock: 138
$8.13 $10.29 -21%
Medusa's Magic, 1 qt
In Stock: 89
$8.01 $17.49 -54%
Mega Morpheus, 1 qt
In Stock: 12
$8.01 $17.49 -54%
Pegasus Potion, 1 qt
In Stock: 8
$8.01 $17.49 -54%
True Organic All-Purpose Plant Food 5-4-5 | 4.5lb - Shaker Jug - Covers up to 100sq ft - OMRI Listed - (Case of 6)
In Stock: 150
$8.00 $15.99 -50%
True Organic Tomato & Vegetable Food 4-5-6 | 4.5lb - Shaker Jug - Use Monthly - Covers up to 88sq ft - OMRI Listed - (Case of 6)
In Stock: 114
$8.00 $15.99 -50%
Down to Earth Dolomite Lime | 5lb - OMRI Listed - (Case of 6)
In Stock: 510
$7.96 $10.99 -28%
Grotek Micro Power 0-0-2 | 500mL - (Case of 6)
In Stock: 36
$7.83 $20.62 -62%
HDI Europonic FossilFuel Liquid Humic Acids | 32oz
In Stock: 27
$7.80 $21.99 -65%
Grotek Cal-Max, 1 qt
In Stock: 2229
$7.68 $13.96 -45%
SUPERthrive Bonsai-Pro Liquid Plant Food 7-9-5 | 8oz - (Case of 12)
In Stock: 720
$7.51 $12.47 -40%
SUPERthrive Orchid-Pro Liquid Plant Food 7-8-6 | 8oz - (Case of 12)
In Stock: 216
$7.51 $12.47 -40%
Down to Earth Oyster Shell | 5lb - OMRI Listed - (Case of 6)
Out of stock
$7.47 $11.99 -38%
MYKE Vegetable & Herb Growth Enhancer | 1.8oz - OMRI Listed - (Pallet of 36)
In Stock: 116
$7.46 $11.29 -34%
Grotek Bud Fuel Pro 1-3-4 | 500mL - (Case of 6)
In Stock: 24
$7.33 $22.29 -67%
Optic Foliar ATAK Concentrate, 250 ml
In Stock: 2
$7.33 $18.99 -61%
Sustane 3-5-3 Compost Tea Bag | 12ct - 21gm Packs - OMRI Listed - (Case of 10)
In Stock: 30
$7.31 $10.45 -30%
Grotek Monster Grow Pro, 130 g
In Stock: 918
$7.23 $13.15 -45%
SUPERthrive Bloom Plant Nutrients 3-12-6 | 8oz - (Case of 12)
In Stock: 9252
$7.22 $11.99 -40%
SUPERthrive Foliage-Pro Liquid Plant Food 9-3-6 | 8oz - (Case of 12)
Out of stock
$7.22 $11.99 -40%
SUPERthrive Grow Liquid Plant Food 7-9-5 | 8oz - (Case of 12)
In Stock: 756
$7.22 $11.99 -40%
SUPERthrive Pro-TeKt Nutritional Supplement 0-0-3 | 8oz - The Silicon Solution - (Case of 12)
Out of stock
$7.22 $11.99 -40%
SUPERthrive ZYME 100% Enzyme Cleaner | 8oz - (Case of 12)
In Stock: 804
$7.22 $15.99 -55%
Mad Farmer Nutrient UpTake Solution (N.U.T.S.), 1 gal
In Stock: 33
$7.08 $53.55 -87%
DaKine 420 Nitro Nutrients Base | 500g - (Case of 4)
In Stock: 7
$7.04 $28.99 -76%
DaKine 420 Nitro Nutrients Bloom | 500g - (Case of 4)
In Stock: 8
$7.04 $28.99 -76%
DaKine 420 Bio Minerals | 500g - (Case of 4)
In Stock: 8
$7.04 $28.99 -76%
DaKine 420 CalMag | 500g - (Case of 4)
In Stock: 4
$7.04 $28.99 -76%
DaKine 420 Sticky Icky Enzymes | 100g - (Case of 20)
In Stock: 20
$7.04 $28.99 -76%
DaKine 420 Nitro Nutrients Grow | 500g - (Case of 4)
In Stock: 8
$7.04 $28.99 -76%
SUPERthrive Mag-Pro Nutritional Supplement 2-15-4 | 8oz - (Case of 12)
In Stock: 6310
$7.02 $10.99 -36%
Grotek Final Flush Blueberry, 1 L
In Stock: 447
$7.01 $15.19 -54%
Down to Earth Calcium 96 | 1lb - OMRI Listed - (Case of 6)
In Stock: 18
$6.99
HDI Ionic Bloom for Soil Premium Plant Nutrient 2-2-5 | 32oz
In Stock: 383
$6.97 $21.34 -67%
Growth Science Nutrients Base A, 1 qt
In Stock: 10
$6.96 $17.99 -61%
Grotek Heavy Bud Pro 1-0-3 | 500mL - (Case of 6)
In Stock: 12
$6.92 $20.99 -67%
Wiggle Worm Soil Builder Pure Worm Castings Organic Fertilizer | 4.5lb - OMRI Listed - (Case of 12)
In Stock: 1120
$6.85 $11.29 -39%
Wiggle Worm Soil Builder Pure Worm Castings Organic Fertilizer | 4.5lb - OMRI Listed - (Case of 10)
Out of stock
$6.85 $11.29 -39%
Olivia's Cloning Solution | 32oz (1qt) - (Case of 24)
In Stock: 24
$6.82 $13.95 -51%
Plant Success Organics Granular 3-1-2 | 4oz - Granules - (Case of 12)
In Stock: 243
$6.75 $8.65 -22%
Elite Resin D, 32 oz - A Hydrofarm Exclusive!
In Stock: 87
$6.73 $72.59 -91%
Down to Earth Solution Grade Gypsum | 5lb - OMRI Listed - (Case of 5)
Out of stock
$6.72 $15.49 -57%
Primordial Solutions Rootamentary, 16 oz
In Stock: 49
$6.61 $45.99 -86%
Remo Micro, 1 L
In Stock: 39
$6.57 $22.99 -71%
Grotek Biofuse | 100g - (Case of 12)
In Stock: 260
$6.52 $19.79 -67%
Mad Farmer Mother Of All Bloom, 100g
In Stock: 133
$6.52 $16.05 -59%
Key Grow Solutions Green Dragon 0-0-18 | 32oz - (Case of 14)
In Stock: 896
$6.47 $39.99 -84%
Key Grow Solutions Silver Rabbit 7-20-4 | 32oz - (Case of 14)
In Stock: 154
$6.47 $39.99 -84%
Optic Foliar REV, 500 ml - (Case of 12)
In Stock: 19
$6.35 $71.99 -91%
Optic Foliar Watts, 500 ml - (Case of 12)
In Stock: 24
$6.35 $71.99 -91%
Grotek Vitamax Pro 1-1-1 | 500mL - (Case of 6)
In Stock: 6
$6.32 $14.59 -57%
True Organic Bone Meal 7-7-0 | 3lb - Resealable Bag - Spring & Fall Application - Covers up to 61sq ft. - OMRI Listed - (Case of 6)
In Stock: 905
$6.32 $7.99 -21%
Down to Earth Langbeinite 0-0-22 | 1lb - OMRI Listed - (Case of 6)
In Stock: 113
$6.16 $10.29 -40%
Down to Earth Potassium Sulfate 0-0-50 | 1lb - OMRI Listed - (Case of 6)
In Stock: 192
$6.16 $10.29 -40%
Soul Sensei Micro, 1 gal
In Stock: 325
$6.10 $46.19 -87%
Optic Foliar Transport, 60 ml - (Case of 12)
In Stock: 12
$6.09 $12.99 -53%
True Organic Liquid All-Purpose Plant Food | 16oz - OMRI Listed - (Case of 6)
In Stock: 132
$5.98 $8.99 -33%
True Organic Liquid Tomato & Vegetable Food 3-2-3 | 16oz - Concentrate - Use Every Two Weeks - Covers up to 30sq ft - OMRI Listed - (Case of 6)
In Stock: 174
$5.98 $8.99 -33%
True Organic Liquid Bloom Boost | 16oz - OMRI Listed - (Case of 6)
In Stock: 174
$5.98 $8.99 -33%
Grotek Blossom Blaster Pro 1-4-0 | 500mL - (Case of 6)
In Stock: 30
$5.94 $17.99 -67%
Grotek Cal Max 2-0-0 | 500mL - (Case of 6)
In Stock: 12
$5.86 $11.29 -48%
Down to Earth Shrimp Meal 6-6-0 | 2lb - OMRI Listed - (Case of 6)
In Stock: 72
$5.77 $11.99 -52%
Grotek Insta-Green 3-0-0 | 500mL - (Case of 6)
In Stock: 12
$5.54 $10.59 -48%
Grotek Vitamax Plus, 1 L
In Stock: 185
$5.37 $24.99 -79%
Vegamatrix Amp-It, 1qt
In Stock: 82
$5.37 $35.99 -85%
FoxFarm Bush Doctor Cal-Mag, 1 pt
In Stock: 1108
$5.32 $17.38 -69%
Soul Sensei Bloom, 1 gal
In Stock: 55
$5.31 $40.16 -87%
Soul Sensei Grow, 1 gal
In Stock: 213
$5.31 $40.16 -87%
HDI Clonex Rooting Gel | 15ml - Single-Use Packet - (Case of 18)
In Stock: 2018
$5.28 $6.61 -20%
DaKine 420 Atomic Root Powder | 100g - (Case of 20)
In Stock: 40
$5.21 $21.49 -76%
DaKine 420 Shock & Awe Bloom Booster | 200g - (Case of 20)
In Stock: 40
$5.21 $21.49 -76%
FoxFarm Happy Frog Japanese Maple Fertilizer, 4 lb bag
In Stock: 416
$5.17 $17.42 -70%
Down To Earth Mini Cactus Mix 2-4-8 | 1lb - (Case of 12)
In Stock: 834
$4.99
Grotek Final Flush | 1L - Regular - (Case of 6)
In Stock: 42
$4.87 $16.49 -70%
Key Grow Solutions Red Royal 2-0-7 | 32oz - (Case of 14)
In Stock: 140
$4.86 $29.99 -84%
Key Grow Solutions White Royal 4-10-5 | 32oz - (Case of 14)
In Stock: 158
$4.86 $27.99 -83%
Grotek Cal Max 2-0-0 | 1L - (Case of 6)
In Stock: 60
$4.83 $14.69 -67%
Grotek Vitamax Plus 1-1-2 | 500mL - (Case of 6)
In Stock: 30
$4.82 $14.59 -67%
Great White Granular 1 Mycorrhizal | 4oz - OMRI Listed - (Case of 24)
In Stock: 31
$4.79 $6.16 -22%
Down to Earth Gypsum | 1lb - OMRI Listed - (Case of 6)
In Stock: 120
$4.78 $6.99 -32%
Grotek Insta-Green 3-0-0 | 1L - (Case of 6)
In Stock: 132
$4.67 $14.29 -67%
Humboldt Nutrients Mayan Microzyme, 8 oz
In Stock: 4
$4.62 $34.99 -87%
Grotek Monster Grow Pro 18-36-1 | 130g
In Stock: 84
$4.57 $13.79 -67%
Aptus Breakout Powder, (5-Pack)
In Stock: 645
$4.53 $72.19 -94%
Key Grow Solutions Blue Butterfly 6-4-5 | 32oz - (Case of 14)
In Stock: 112
$4.32 $22.99 -81%
DaKine 420 Nitro Nutrients Base | 200g - (Case of 20)
In Stock: 80
$4.25 $17.49 -76%
DaKine 420 Nitro Nutrients Grow | 200g - (Case of 20)
In Stock: 40
$4.25 $17.49 -76%
Remo Grow, 20 L
In Stock: 27
$4.00 $197.99 -98%
Down to Earth All-Purpose Mix 4-6-2 | 1lb - OMRI Listed - (Case of 12)
In Stock: 156
$3.89 $6.29 -38%
Down To Earth Rose & Flower Mix 4-8-4 | 1lb - (Case of 12)
In Stock: 948
$3.89 $6.29 -38%
Down to Earth Acid Mix 4-3-6 | 1lb - For Acid Soil Loving Plants - (Case of 12)
In Stock: 432
$3.89 $6.29 -38%
Down to Earth Starter Mix 3-3-3 | 1lb - OMRI Listed - (Case of 12)
In Stock: 60
$3.89 $6.29 -38%
Down to Earth Vegetable Garden 4-4-4 | 1lb - OMRI Listed - (Case of 12)
In Stock: 324
$3.89 $6.29 -38%
Down to Earth Citrus Mix 6-3-3 | 1lb - OMRI Listed - (Case of 12)
In Stock: 2064
$3.89 $6.29 -38%
FoxFarm Cultivation Nation Micro, 1 pt
In Stock: 169
$3.83 $17.50 -78%
BioAG Ful-Humix | 100g - OMRI Listed - (Case of 24)
In Stock: 314
$3.75 $12.30 -70%
Down to Earth Blood Meal 12-0-0 | 0.5lb - OMRI Listed - (Case of 12)
In Stock: 144
$3.70 $5.99 -38%
Down to Earth Fish Bone Meal 4-12-0 | 1lb - OMRI Listed - (Case of 12)
In Stock: 672
$3.70 $5.99 -38%
Down to Earth Bat Guano 7-3-1 | 0.25lb - OMRI Listed - (Case of 12)
In Stock: 192
$3.70 $5.99 -38%
Down to Earth Alfalfa Meal 2.5-0.5-2.5 | 0.5lb - OMRI Listed
In Stock: 112
$3.69
Optic Foliar ATAK Concentrate, 1 L
In Stock: 25
$3.68 $42.99 -91%
Growth Science Nutrients Rock Solid, 1 qt
In Stock: 48
$3.66 $24.99 -85%
DaKine 420 Foliar Science | 250g - (Case of 4)
In Stock: 40
$3.64 $14.99 -76%
Optic Foliar ATAK Concentrate, 4 L
In Stock: 34
$3.63 $94.99 -96%
House & Garden Multi Zen, 500 ml
In Stock: 59
$3.60 $27.29 -87%
Down to Earth Kelp Meal 1-0.1-2 | 0.5lb - OMRI Listed
In Stock: 252
$3.35 $6.99 -52%
Grotek Monster Grow Pro, 20 g
In Stock: 5
$3.33 $7.48 -55%
Key Grow Solutions Purple Cat 3-0-0 | 32oz - (Case of 14)
In Stock: 154
$3.23 $17.99 -82%
Down to Earth AZOMITE Slow Release Powder | 1lb - OMRI Listed - (Case of 12)
In Stock: 1940
$3.05 $4.39 -31%
Plant Success Organics Soluble 0.5-0.1-7 | 0.5oz
In Stock: 277
$2.88 $3.69 -22%
Plant Success Organics Granular 3-1-2 | 1oz - Granules - (Case of 10)
In Stock: 90
$2.82 $3.63 -22%
Roots Organics Ancient Amber, 5 gal
In Stock: 73
$2.71 $188.99 -99%
Soul Sensei Micro, 1 qt
In Stock: 1095
$2.61 $19.79 -87%
Grotek Monster Grow Pro 18-36-1 | 20g
In Stock: 1
$2.60 $7.89 -67%
Grotek Monster Bloom 0-50-30 | 15ct - 0.7oz
In Stock: 9
$2.60 $7.89 -67%
Down to Earth Oyster Shell | 1lb - OMRI Listed - (Case of 12)
Out of stock
$2.48 $3.69 -33%
Down to Earth Granular Humic Acids | 1lb - OMRI Listed - (Case of 12)
Out of stock
$2.48 $3.69 -33%
Grotek Gro-Silic, 250 ml
In Stock: 82
$2.48 $32.99 -92%
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