Quick view Details Mad Farmer | sku: MFCALMAG6G Mad Farmer Cal Mag 6 Gallon MSRP: $262.50 Was: $262.50 Now: $157.50 Add to Cart
Quick view Details Mad Farmer | sku: MFCALMAG55G Mad Farmer Cal+Mag 55 Gallon MSRP: $2,173.45 Was: $2,173.45 Now: $1,309.30 View Details
Quick view Details Mad Farmer | sku: MFCALMAG2.5G Mad Farmer Cal+Mag 2.5 Gallon MSRP: $117.08 Was: $117.08 Now: $76.27 Add to Cart
Quick view Details Mad Farmer | sku: MFCALMAG1QT Mad Farmer Cal+Mag 1 Quart MSRP: $21.62 Was: $21.62 Now: $14.05 Add to Cart
Quick view Details Mad Farmer | sku: MFCALMAG1G Mad Farmer Cal+Mag 1 Gallon MSRP: $53.71 Was: $53.71 Now: $34.93 View Details
Quick view Details House & Garden | sku: HGMBO20L House & Garden Magnesium Boost- 20 Liter MSRP: $682.50 Was: $682.50 Now: $409.50 Add to Cart
Quick view Details House & Garden | sku: HGMBO05L House & Garden Magnesium Boost- 5 Liter MSRP: $179.55 Was: $179.55 Now: $116.71 Add to Cart
Quick view Details House & Garden | sku: HGMBO01L House & Garden Magnesium Boost- 1 Liter MSRP: $38.56 Was: $38.56 Now: $25.07 Add to Cart
Quick view Details Grotek | sku: GTCM10L Cal Max 10 L MSRP: $116.99 Was: $116.99 Now: $83.18 Add to Cart
Quick view Details Foxfarm | sku: FX17250 Cultivation Nation Cal-Mag 5 Gallon MSRP: $187.95 Was: $187.95 Now: $131.57 View Details
Quick view Details Foxfarm | sku: FX17240 Cultivation Nation Cal-Mag 2.5 Gallon MSRP: $117.65 Was: $117.65 Now: $86.47 View Details
Quick view Details Foxfarm | sku: FX17230 Cultivation Nation Cal-Mag Gallon MSRP: $65.95 Was: $65.95 Now: $48.47 Add to Cart
Quick view Details Foxfarm | sku: FX17210 Cultivation Nation Cal-Mag Quart MSRP: $19.13 Was: $19.13 Now: $14.06 View Details
Quick view Details Foxfarm | sku: FX17200 Cultivation Nation Cal-Mag Pint MSRP: $13.13 Was: $13.13 Now: $9.65 Add to Cart
Quick view Details Foxfarm | sku: FX17030 FoxFarm Bush Doctor Cal-Mag, 1 gal MSRP: $101.02 Was: $101.02 Now: $74.25 Add to Cart
Quick view Details Foxfarm | sku: FX17020 FoxFarm Bush Doctor Cal-Mag, 1 qt MSRP: $26.75 Was: $26.75 Now: $19.66 Add to Cart
Quick view Details Foxfarm | sku: FX17010 FoxFarm Bush Doctor Cal-Mag, 1 pt MSRP: $16.88 Was: $16.88 Now: $12.41 Add to Cart
Quick view Details Emerald Triangle | sku: ETMAGGAL Magnum Magnesium Supplement, 1 gal MSRP: $43.99 Was: $43.99 Now: $31.01 View Details
Quick view Details Emerald Triangle | sku: ETMAG2.5GAL Magnum Magnesium Supplement, 2.5 gal MSRP: $87.99 Was: $87.99 Now: $62.05 View Details
Quick view Details Bountea | sku: BN3625 Bountea Cal-Mag, 2.5 gal MSRP: $119.99 Was: $119.99 Now: $51.60 View Details
Quick view Details Bountea | sku: BN3610 Bountea Cal-Mag, 1 gal MSRP: $49.99 Was: $49.99 Now: $21.56 View Details
Quick view Details Athena | sku: LQ-CM-1G Athena Cal-Mag Gallon MSRP: $45.00 Was: $45.00 Now: $31.50 Add to Cart
Quick view Details Athena | sku: LQ-CM-5G Athena Cal-Mag 5 Gallon MSRP: $200.00 Was: $200.00 Now: $140.00 Add to Cart
Quick view Details Botanicare | sku: HGC732127 Botanicare Cal-Mag Plus 250 Gallon MSRP: $11,449.70 Was: $11,449.70 Now: $6,409.98 View Details
Quick view Details Roots Organics | sku: ROCM5G Roots Organics CalMag 5 Gallon MSRP: $374.20 Was: $374.20 Now: $208.31 Add to Cart
Quick view Details Roots Organics | sku: ROCM2.5G Roots Organics CalMag 2.5 Gallon MSRP: $214.31 Was: $214.31 Now: $119.13 Add to Cart
Quick view Details Roots Organics | sku: ROCMG Roots Organics CalMag Gallon MSRP: $96.39 Was: $96.39 Now: $53.64 Add to Cart
Quick view Details Roots Organics | sku: ROCMQ Roots Organics CalMag Quart MSRP: $28.90 Was: $28.90 Now: $15.91 Add to Cart
Quick view Details General Hydroponics | sku: HGC733531 GH CALiMAGic 15 Gallon (Freight Only) MSRP: $806.37 Was: $806.37 Now: $451.69 View Details
Quick view Details Monterey | sku: MBR5025 Monterey Epsom Salts 4 lb MSRP: $16.99 Was: $16.99 Now: $12.74 Add to Cart
Quick view Details Humboldt Nutrients | sku: HNCM405 Calyx Magnum Quart MSRP: $21.99 Was: $21.99 Now: $14.30 View Details
Quick view Details Cutting Edge Solutions | sku: CES2804 Mag Amped 6 Gallon MSRP: $445.99 Was: $445.99 Now: $274.63 View Details
Quick view Mad Farmer | sku: MFCALMAG6G Mad Farmer Cal Mag 6 Gallon Mad Farmers Cal+Mag is a readily available Calcium/Magnesium supplement designed to improve soil nutrient conditions for better plant mass and prevent nutrient deficiency-based plant disorders due to with Calcium/Magnesium deficiencies such as blossom... MSRP: $262.50 Was: $262.50 Now: $157.50 Add to Cart
Quick view Mad Farmer | sku: MFCALMAG55G Mad Farmer Cal+Mag 55 Gallon Mad Farmers Cal+Mag is a readily available Calcium/Magnesium supplement designed to improve soil nutrient conditions for better plant mass and prevent nutrient deficiency-based plant disorders due to with Calcium/Magnesium deficiencies such as blossom... MSRP: $2,173.45 Was: $2,173.45 Now: $1,309.30 View Details
Quick view Mad Farmer | sku: MFCALMAG2.5G Mad Farmer Cal+Mag 2.5 Gallon Mad Farmers Cal+Mag is a readily available Calcium/Magnesium supplement designed to improve soil nutrient conditions for better plant mass and prevent nutrient deficiency-based plant disorders due to with Calcium/Magnesium deficiencies such as blossom... MSRP: $117.08 Was: $117.08 Now: $76.27 Add to Cart
Quick view Mad Farmer | sku: MFCALMAG1QT Mad Farmer Cal+Mag 1 Quart Mad Farmers Cal+Mag is a readily available Calcium/Magnesium supplement designed to improve soil nutrient conditions for better plant mass and prevent nutrient deficiency-based plant disorders due to with Calcium/Magnesium deficiencies such as blossom... MSRP: $21.62 Was: $21.62 Now: $14.05 Add to Cart
Quick view Mad Farmer | sku: MFCALMAG1G Mad Farmer Cal+Mag 1 Gallon Mad Farmers Cal+Mag is a readily available Calcium/Magnesium supplement designed to improve soil nutrient conditions for better plant mass and prevent nutrient deficiency-based plant disorders due to with Calcium/Magnesium deficiencies such as blossom... MSRP: $53.71 Was: $53.71 Now: $34.93 View Details
Quick view House & Garden | sku: HGMBO20L House & Garden Magnesium Boost- 20 Liter House & Garden Magnesium Boost Magnesium Boost supports longer vegetative growth and larger-leafed varieties by supplying additional magnesium and nitrogen. Magnesium and nitrogen are central components of chlorophyll, the plant pigment that absorbs... MSRP: $682.50 Was: $682.50 Now: $409.50 Add to Cart
Quick view House & Garden | sku: HGMBO05L House & Garden Magnesium Boost- 5 Liter House & Garden Magnesium Boost Magnesium Boost supports longer vegetative growth and larger-leafed varieties by supplying additional magnesium and nitrogen. Magnesium and nitrogen are central components of chlorophyll, the plant pigment that absorbs... MSRP: $179.55 Was: $179.55 Now: $116.71 Add to Cart
Quick view House & Garden | sku: HGMBO01L House & Garden Magnesium Boost- 1 Liter House & Garden Magnesium Boost Magnesium Boost supports longer vegetative growth and larger-leafed varieties by supplying additional magnesium and nitrogen. Magnesium and nitrogen are central components of chlorophyll, the plant pigment that absorbs... MSRP: $38.56 Was: $38.56 Now: $25.07 Add to Cart
Quick view Grotek | sku: GTCM10L Cal Max 10 L During periods of high temperatures and accelerated growth, plants can develop nutrient deficiencies, which are preventable. Cal-Max™ was developed to provide the additional calcium, magnesium and iron needed to support peak production... MSRP: $116.99 Was: $116.99 Now: $83.18 Add to Cart
Quick view Foxfarm | sku: FX17250 Cultivation Nation Cal-Mag 5 Gallon Cultivation Nation® Cal-Mag is a supplement for use during fruiting and flowering to address nutrient deficiency problems that can occur in hydroponic, soil and both small and large-scale growing environments.Mix 1 Tbsp (15 mL) per gallon (4 L)... MSRP: $187.95 Was: $187.95 Now: $131.57 View Details
Quick view Foxfarm | sku: FX17240 Cultivation Nation Cal-Mag 2.5 Gallon Cultivation Nation® Cal-Mag is a supplement for use during fruiting and flowering to address nutrient deficiency problems that can occur in hydroponic, soil and both small and large-scale growing environments.Mix 1 Tbsp (15 mL) per gallon (4 L)... MSRP: $117.65 Was: $117.65 Now: $86.47 View Details
Quick view Foxfarm | sku: FX17230 Cultivation Nation Cal-Mag Gallon Cultivation Nation® Cal-Mag is a supplement for use during fruiting and flowering to address nutrient deficiency problems that can occur in hydroponic, soil and both small and large-scale growing environments.Mix 1 Tbsp (15 mL) per gallon (4 L)... MSRP: $65.95 Was: $65.95 Now: $48.47 Add to Cart
Quick view Foxfarm | sku: FX17210 Cultivation Nation Cal-Mag Quart Cultivation Nation® Cal-Mag is a supplement for use during fruiting and flowering to address nutrient deficiency problems that can occur in hydroponic, soil and both small and large-scale growing environments.Mix 1 Tbsp (15 mL) per gallon (4 L)... MSRP: $19.13 Was: $19.13 Now: $14.06 View Details
Quick view Foxfarm | sku: FX17200 Cultivation Nation Cal-Mag Pint Cultivation Nation® Cal-Mag is a supplement for use during fruiting and flowering to address nutrient deficiency problems that can occur in hydroponic, soil and both small and large-scale growing environments.Mix 1 Tbsp (15 mL) per gallon (4 L)... MSRP: $13.13 Was: $13.13 Now: $9.65 Add to Cart
Quick view Foxfarm | sku: FX17030 FoxFarm Bush Doctor Cal-Mag, 1 gal Cal-Mag Supplement1 - 0 - 0, 3% Calcium 0.9% Magnesium Nobody likes blossom end rot or tip burn. That’s why FoxFarm brings you BUSH DOCTOR® CAL-MAG. Calcium and magnesium help strengthen cell walls and aid in fruit development, helping you... MSRP: $101.02 Was: $101.02 Now: $74.25 Add to Cart
Quick view Foxfarm | sku: FX17020 FoxFarm Bush Doctor Cal-Mag, 1 qt Cal-Mag Supplement1 - 0 - 0, 3% Calcium 0.9% Magnesium Nobody likes blossom end rot or tip burn. That’s why FoxFarm brings you BUSH DOCTOR® CAL-MAG. Calcium and magnesium help strengthen cell walls and aid in fruit development, helping you... MSRP: $26.75 Was: $26.75 Now: $19.66 Add to Cart
Quick view Foxfarm | sku: FX17010 FoxFarm Bush Doctor Cal-Mag, 1 pt Cal-Mag Supplement1 - 0 - 0, 3% Calcium 0.9% Magnesium Nobody likes blossom end rot or tip burn. That’s why FoxFarm brings you BUSH DOCTOR® CAL-MAG. Calcium and magnesium help strengthen cell walls and aid in fruit development, helping you... MSRP: $16.88 Was: $16.88 Now: $12.41 Add to Cart
Quick view Emerald Triangle | sku: ETMAGGAL Magnum Magnesium Supplement, 1 gal Magnum with Vitamin B1 is a potent magnesium supplement for preventing or treating the magnesium deficiency that often appears during bloom. Chlorophyll deficiency in the bloom stage causes fading leaves right when flowers are putting on mass at a rapid... MSRP: $43.99 Was: $43.99 Now: $31.01 View Details
Quick view Emerald Triangle | sku: ETMAG2.5GAL Magnum Magnesium Supplement, 2.5 gal Magnum with Vitamin B1 is a potent magnesium supplement for preventing or treating the magnesium deficiency that often appears during bloom. Chlorophyll deficiency in the bloom stage causes fading leaves right when flowers are putting on mass at a rapid... MSRP: $87.99 Was: $87.99 Now: $62.05 View Details
Quick view Bountea | sku: BN3625 Bountea Cal-Mag, 2.5 gal Bountea Cal-Mag is a liquid plant nutrient product providing essential trace elements for plant vitality. Bountea Cal-Mag is complimentary to the Bountea Growing System and comparable to other top shelf liquid products. Bountea Cal-Mag... MSRP: $119.99 Was: $119.99 Now: $51.60 View Details
Quick view Bountea | sku: BN3610 Bountea Cal-Mag, 1 gal Bountea Cal-Mag is a liquid plant nutrient product providing essential trace elements for plant vitality. Bountea Cal-Mag is complimentary to the Bountea Growing System and comparable to other top shelf liquid products. Bountea Cal-Mag... MSRP: $49.99 Was: $49.99 Now: $21.56 View Details
Quick view Athena | sku: LQ-CM-1G Athena Cal-Mag Gallon Athena CaMg is designed to supplement either of our 2-part liquid formulas. Some cultivars and growing conditions may require higher doses of Calcium, Magnesium, Iron and Nitrogen during heavy growth and development phases. This product effectively... MSRP: $45.00 Was: $45.00 Now: $31.50 Add to Cart
Quick view Athena | sku: LQ-CM-5G Athena Cal-Mag 5 Gallon Athena CaMg is designed to supplement either of our 2-part liquid formulas. Some cultivars and growing conditions may require higher doses of Calcium, Magnesium, Iron and Nitrogen during heavy growth and development phases. This product effectively... MSRP: $200.00 Was: $200.00 Now: $140.00 Add to Cart
Quick view Botanicare | sku: HGC732127 Botanicare Cal-Mag Plus 250 Gallon Cal-Mag Plus is a highly fortified calcium, magnesium and iron plant supplement formulated to correct common deficiencies. Supplementing your preferred nutrient program with Cal-Mag Plus is strongly recommended when using reverse osmosis water and when... MSRP: $11,449.70 Was: $11,449.70 Now: $6,409.98 View Details
Quick view Roots Organics | sku: ROCM5G Roots Organics CalMag 5 Gallon Roots Organics CalMag is a pure and all natural blend of calcium, magnesium and sulfur to support plants during fast growth. By creating a product free of added nitrogen, phosphate and potassium, we give you control to supplement as needed without... MSRP: $374.20 Was: $374.20 Now: $208.31 Add to Cart
Quick view Roots Organics | sku: ROCM2.5G Roots Organics CalMag 2.5 Gallon Roots Organics CalMag is a pure and all natural blend of calcium, magnesium and sulfur to support plants during fast growth. By creating a product free of added nitrogen, phosphate and potassium, we give you control to supplement as needed without... MSRP: $214.31 Was: $214.31 Now: $119.13 Add to Cart
Quick view Roots Organics | sku: ROCMG Roots Organics CalMag Gallon Roots Organics CalMag is a pure and all natural blend of calcium, magnesium and sulfur to support plants during fast growth. By creating a product free of added nitrogen, phosphate and potassium, we give you control to supplement as needed without... MSRP: $96.39 Was: $96.39 Now: $53.64 Add to Cart
Quick view Roots Organics | sku: ROCMQ Roots Organics CalMag Quart Roots Organics CalMag is a pure and all natural blend of calcium, magnesium and sulfur to support plants during fast growth. By creating a product free of added nitrogen, phosphate and potassium, we give you control to supplement as needed without... MSRP: $28.90 Was: $28.90 Now: $15.91 Add to Cart
Quick view General Hydroponics | sku: HGC733531 GH CALiMAGic 15 Gallon (Freight Only) CALiMAGic is a concentrated blend of readily available calcium and magnesium. It is formulated to assist fast growing plants by preventing secondary nutrient deficiencies. CALiMAGic helps optimize plant nutrition and enhances plant growth and development... MSRP: $806.37 Was: $806.37 Now: $451.69 View Details
Quick view Monterey | sku: MBR5025 Monterey Epsom Salts 4 lb Promotes bloom in roses and other flowering plants. Absorbed through the roots and foliage of plant. Epsom Salts is a source of magnesium that is essential to plant development. It is required by plants to produce chlorophyll. It also helps plants absorb... MSRP: $16.99 Was: $16.99 Now: $12.74 Add to Cart
Quick view Humboldt Nutrients | sku: HNCM405 Calyx Magnum Quart With an available 2% (N), 3.4% (Ca), and 1.4% (Mg) + micronutrients, Calyx Magnum gives gardeners vital nutrients needed for plant development and growth. Another huge benefit is that we created Calyx Magnum without the use of chemical chelates like... MSRP: $21.99 Was: $21.99 Now: $14.30 View Details
Quick view Cutting Edge Solutions | sku: CES2804 Mag Amped 6 Gallon Mag-Amped is a pure magnesium product combined with an organic surfactant that helps with uptake and overall solubility. Magnesium is essential for chlorophyll production in plants, and in turn chlorophyll is the component in photosynthesis, essentially... MSRP: $445.99 Was: $445.99 Now: $274.63 View Details