Nutrients & Additives
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Humboldt County's Own Humboldt County's Own Crystal Burst - 2.5 GAL
Crystal Burst is Humboldt County's Own liquid bloom booster, a 0-15-15 phosphorus and potassium concentrate that goes in once flowers start to form. HCO says it's compatible with all nutrient brands. Analysis: 0-15-15 (N-P-K) Size: 2.5 gallons (9.45 L) Rate: 1 tsp (5 ml) per gallon of water, in soil or hydro Timing: start when you first see flowers forming, around the second week of bloom, and continue until a week before harvest Use Crystal Burst or Sonic Bloom, not both Works with all nutrient brands
$172.00
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Humboldt County's Own Humboldt County's Own Snow Storm Ultra - 5 GAL
Snow Storm Ultra is Humboldt County's Own additive for the snowy, frosted look growers want on finished flowers. It starts in early veg and runs straight through bloom, and HCO says it works with all nutrient lines. Size: 5 gallons (18.9 L) Soil: 1 tsp per gallon of water beginning in early veg; some growers go up to 2–3 tsp per gallon at peak bloom Hydro: ½–1 tsp per gallon starting in early veg and run continuously; can be raised to 2–3 tsp Foliar (if it's not in your reservoir): 1 tsp per gallon 3–4 times a week in veg and early bloom; 1–2 tsp per gallon 3–4 times a week in bloom Clones: ½ tsp per gallon in feedings, or as a foliar spray at that rate 2–4 times a week Works with all nutrient lines, in soil or hydro
$594.00
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Humboldt County's Own Humboldt County's Own Snow Storm Ultra - 2.5 GAL
Snow Storm Ultra is Humboldt County's Own additive for the snowy, frosted look growers want on finished flowers. It starts in early veg and runs straight through bloom, and HCO says it works with all nutrient lines. Size: 2.5 gallons (9.45 L) Soil: 1 tsp per gallon of water beginning in early veg; some growers go up to 2–3 tsp per gallon at peak bloom Hydro: ½–1 tsp per gallon starting in early veg and run continuously; can be raised to 2–3 tsp Foliar (if it's not in your reservoir): 1 tsp per gallon 3–4 times a week in veg and early bloom; 1–2 tsp per gallon 3–4 times a week in bloom Clones: ½ tsp per gallon in feedings, or as a foliar spray at that rate 2–4 times a week Works with all nutrient lines, in soil or hydro
$330.00
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Humboldt County's Own Humboldt County's Own Snow Storm Ultra - 8 OZ
Snow Storm Ultra is Humboldt County's Own additive for the snowy, frosted look growers want on finished flowers. It starts in early veg and runs straight through bloom, and HCO says it works with all nutrient lines. Size: 8 fl oz (236 ml) Soil: 1 tsp per gallon of water beginning in early veg; some growers go up to 2–3 tsp per gallon at peak bloom Hydro: ½–1 tsp per gallon starting in early veg and run continuously; can be raised to 2–3 tsp Foliar (if it's not in your reservoir): 1 tsp per gallon 3–4 times a week in veg and early bloom; 1–2 tsp per gallon 3–4 times a week in bloom Clones: ½ tsp per gallon in feedings, or as a foliar spray at that rate 2–4 times a week Works with all nutrient lines, in soil or hydro
$19.99
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Humboldt County's Own Humboldt County's Own Purple Maxx - 2.5 GAL
Purple Maxx is Humboldt County's Own finishing additive for color. It goes in for the last two to three weeks before harvest to intensify final color in varieties with purple genetics, and it runs right alongside your regular nutrients. What it does: intensifies final color late in flower in varieties that can turn purple Size: 2.5 gallons (9.45 L) Soil: 1 tsp per gallon of water, starting 2–3 weeks before harvest; some varieties take 2–3 tsp per gallon for extra intensity Keep it going through your flush if you flush Hydro: same rate and timing as soil Foliar option: 1 tsp per gallon, 2–3 times a week, sprayed as the finest mist possible without wetting the flowers
$449.99
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Advanced Nutrients Advanced Nutrients Bud Ignitor - 23L
Bud Ignitor is Advanced Nutrients' early-bloom supplement for the first two weeks of flowering, when plants are switching from leaf growth to flower production. It supplies phosphorus and potassium and includes kelp sourced from the Norwegian Sea. Early-bloom supplement with kelp from the Norwegian Sea NPK: 0-1-2 Feed chart: 2 mL/L in bloom weeks 1 and 2, fed to the root zone Adds less than 200 ppm (0.4 EC) when used on its own Works with pH Perfect and non-pH Perfect base nutrients For hydroponic media including coco coir, soil, and continuous liquid-feed systems: drip, NFT, flood and drain, aeroponics and deep water culture Size: 23 L (about 6 gal)
$951.66
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Advanced Nutrients Advanced Nutrients Bud Ignitor - 10L
Bud Ignitor is Advanced Nutrients' early-bloom supplement for the first two weeks of flowering, when plants are switching from leaf growth to flower production. It supplies phosphorus and potassium and includes kelp sourced from the Norwegian Sea. Early-bloom supplement with kelp from the Norwegian Sea NPK: 0-1-2 Feed chart: 2 mL/L in bloom weeks 1 and 2, fed to the root zone Adds less than 200 ppm (0.4 EC) when used on its own Works with pH Perfect and non-pH Perfect base nutrients For hydroponic media including coco coir, soil, and continuous liquid-feed systems: drip, NFT, flood and drain, aeroponics and deep water culture Size: 10 L (about 2.6 gal)
$498.47
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Advanced Nutrients Advanced Nutrients Bud Candy - 10L
Bud Candy is Advanced Nutrients' carbohydrate supplement. It blends simple and complex carbohydrates that feed beneficial microbes in the root zone, plus magnesium, a secondary nutrient plants use to make chlorophyll. Carbohydrates from five sources, plus magnesium NPK: 0-0-0 Feed chart: 2 mL/L through grow weeks 1–4 and bloom weeks 1–7; stop before the flush Add after your base nutrients are fully mixed; for the root zone only, not as a foliar spray Works with pH Perfect and non-pH Perfect base nutrients For hydroponic media including coco coir, and continuous liquid-feed systems: drip, NFT, flood and drain, aeroponics and deep water culture Size: 10 L (about 2.6 gal)
$178.62
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Humboldt County's Own Humboldt County's Own Purple Maxx - 1 GAL
Purple Maxx is Humboldt County's Own finishing additive for color. It goes in for the last two to three weeks before harvest to intensify final color in varieties with purple genetics, and it runs right alongside your regular nutrients. What it does: intensifies final color late in flower in varieties that can turn purple Size: 1 gallon (3.78 L) Soil: 1 tsp per gallon of water, starting 2–3 weeks before harvest; some varieties take 2–3 tsp per gallon for extra intensity Keep it going through your flush if you flush Hydro: same rate and timing as soil Foliar option: 1 tsp per gallon, 2–3 times a week, sprayed as the finest mist possible without wetting the flowers
$200.00
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Humboldt County's Own Humboldt County's Own Purple Maxx - 1 QT
Purple Maxx is Humboldt County's Own finishing additive for color. It goes in for the last two to three weeks before harvest to intensify final color in varieties with purple genetics, and it runs right alongside your regular nutrients. What it does: intensifies final color late in flower in varieties that can turn purple Size: 1 quart (946 ml) Soil: 1 tsp per gallon of water, starting 2–3 weeks before harvest; some varieties take 2–3 tsp per gallon for extra intensity Keep it going through your flush if you flush Hydro: same rate and timing as soil Foliar option: 1 tsp per gallon, 2–3 times a week, sprayed as the finest mist possible without wetting the flowers
$84.99
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Humboldt County's Own Humboldt County's Own Purple Maxx - 8 OZ
Purple Maxx is Humboldt County's Own finishing additive for color. It goes in for the last two to three weeks before harvest to intensify final color in varieties with purple genetics, and it runs right alongside your regular nutrients. What it does: intensifies final color late in flower in varieties that can turn purple Size: 8 fl oz (236 ml) Soil: 1 tsp per gallon of water, starting 2–3 weeks before harvest; some varieties take 2–3 tsp per gallon for extra intensity Keep it going through your flush if you flush Hydro: same rate and timing as soil Foliar option: 1 tsp per gallon, 2–3 times a week, sprayed as the finest mist possible without wetting the flowers
$29.99
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Advanced Nutrients Advanced Nutrients B-52 - 23L
B-52 is Advanced Nutrients' vitamin B supplement, combining a B-vitamin complex with kelp, humic acid and a blend of essential nutrients. It can be fed to cuttings, seedlings, vegetative plants and flowering plants. Vitamin B1 and B-vitamin complex with kelp, humic acid and an essential nutrient blend NPK: 2-1-4 Feed chart: 2 mL/L in grow weeks 1–4 and bloom weeks 3–7 Works with pH Perfect and non-pH Perfect base nutrients For hydroponic media including coco coir, soil, and continuous liquid-feed systems: drip, NFT, flood and drain, aeroponics and deep water culture Size: 23 L (about 6 gal)
$551.18
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Advanced Nutrients Advanced Nutrients pH Perfect Micro - 23L
pH Perfect Micro is the micronutrient part of Advanced Nutrients' pH Perfect Grow, Micro, Bloom base nutrient system. It's mixed in equal amounts with pH Perfect Grow and pH Perfect Bloom, and it always goes into the reservoir first. 3-part base nutrient: use with pH Perfect Grow and pH Perfect Bloom (sold separately) at a 1:1:1 ratio NPK: 2-0-0 Feed chart: 1, 2, 3, then 4 mL/L of each part over grow weeks 1–4, then 4 mL/L through bloom weeks 1–7 Add Micro first, then Grow, then Bloom, stirring between parts; never premix the concentrates pH Perfect technology: Advanced Nutrients says it holds the solution's pH in range for up to a week when mixed per the label Advanced Nutrients recommends RO water or source water up to about 100 ppm (EC 160 µS/cm) For hydroponic media such as rockwool, peat and expanded clay, and continuous liquid-feed systems: drip, NFT, flood and drain, aeroponics and deep water culture Size: 23 L (about 6 gal)
$198.56
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Advanced Nutrients Advanced Nutrients pH Perfect Grow - 23L
pH Perfect Grow is one of the three parts of Advanced Nutrients' pH Perfect Grow, Micro, Bloom base nutrient system. Mixed in equal amounts with pH Perfect Micro and pH Perfect Bloom, it supplies nitrogen and potassium, and the three parts are fed together from the first week of vegetative growth to the end of flowering. 3-part base nutrient: use with pH Perfect Micro and pH Perfect Bloom (sold separately) at a 1:1:1 ratio NPK: 1-0-4 Feed chart: 1, 2, 3, then 4 mL/L of each part over grow weeks 1–4, then 4 mL/L through bloom weeks 1–7 Add Micro first, then Grow, then Bloom, stirring between parts; never premix the concentrates pH Perfect technology: Advanced Nutrients says it holds the solution's pH in range for up to a week when mixed per the label Advanced Nutrients recommends RO water or source water up to about 100 ppm (EC 160 µS/cm) For hydroponic media such as rockwool, peat and expanded clay, and continuous liquid-feed systems: drip, NFT, flood and drain, aeroponics and deep water culture Size: 23 L (about 6 gal)
$128.50
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Advanced Nutrients Advanced Nutrients pH Perfect Bloom - 23L
pH Perfect Bloom is one of the three parts of Advanced Nutrients' pH Perfect Grow, Micro, Bloom base nutrient system. Mixed in equal amounts with pH Perfect Grow and pH Perfect Micro, it supplies the phosphorus and potassium side of the feed from the first week of vegetative growth through the end of flowering. 3-part base nutrient: use with pH Perfect Grow and pH Perfect Micro (sold separately) at a 1:1:1 ratio NPK: 1-3-4 Feed chart: 1, 2, 3, then 4 mL/L of each part over grow weeks 1–4, then 4 mL/L through bloom weeks 1–7 Add Micro first, then Grow, then Bloom, stirring between parts; never premix the concentrates pH Perfect technology: Advanced Nutrients says it holds the solution's pH in range for up to a week when mixed per the label Advanced Nutrients recommends RO water or source water up to about 100 ppm (EC 160 µS/cm) For hydroponic media such as rockwool, peat and expanded clay, and continuous liquid-feed systems: drip, NFT, flood and drain, aeroponics and deep water culture Size: 23 L (about 6 gal)
$110.00
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Build-A-Soil Build A Soil Re-amend Kit for 6 Cubic Foot (8lb)
The Re-amend Kit is made for used soil. Each kit is measured to fit a set number of cubic feet of soil, and this one is for 6 cubic feet. Designed to re-amend your soil after your first grow cycle and every time after that Great for top dressing Balanced with just enough nutrients and minerals for your used soil What's in it Camelina Meal: 1/2 cup per cubic foot Thorvin Kelp Meal: 1/2 cup per cubic foot Crustacean Meal: 1/2 cup per cubic foot Fish Meal: 1/2 cup per cubic foot Gypsum: 1/2 cup per cubic foot All the ingredients total 2.5 cups per cubic foot, or 5 tablespoons per gallon if you want to break the recipe down. How to use Apply the kit together with quality compost or castings at a minimum of 5% per container. That works out to about 1/4 gallon of castings for every 5 gallons of soil. Good to know 1 cubic foot = 7.5 gallons of soil Dimensions: 10.5" x 8.5" x 5.25" Weight: 8.0 lbs
$46.00
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The Soil Makers The Soil Makers Soil Re-Amend Kit - 9LB
Soil Re-Amend Kit — refresh and revitalize your existing living soil without replacing it. Designed for gardeners who manage multiple potted plants, this re-amendment kit makes soil renewal quick, efficient, and economical. Have used soil from The Soil Makers before? This kit provides a straightforward path to restoring soil health. Remove the plant crown, break up root balls in a large container or on a tarp, and thoroughly mix in the kit’s blend of organic amendments. After moistening and covering, let the soil rest for about one to two weeks. To support living, organic no-till soil, top-dress with compost or mulch and replant after a few days so the soil can revitalize—no heavy lifting required. What’s inside the Soil Re-Amend Kit Fish Meal Kelp Meal Crab Meal Fertoz Fish Bone Meal Kmag Alfalfa Meal Gypsum Aragonite How to use Remove the plant crown and lift the root ball out of the pot. Break up root balls in a large container or on a tarp to create a loose, workable soil base. Thoroughly mix in the kit’s eight components until evenly distributed. Moisten the amended soil and cover it; allow it to rest for roughly two weeks to begin rebuilding soil biology and structure. For a living organic no-till approach, top-dress with a layer of compost or mulch and let the soil revitalize for a few days before replanting. Usage rate: Use 2 cups of the Soil Re-Amend Kit per cubic foot of soil for restoration and ongoing vitality. Shipping: Shipping is included in the listed price, making soil renewal convenient and predictable for busy home gardeners. Why this kit stands out: it combines a balanced mix of organic nutrients and mineral amendments tailored to restore soil biology, improve structure, and support steady nutrient release in container gardens and raised beds. It’s a practical, no-till-friendly solution that reduces waste and keeps your organic potting soil thriving year after year. From The Soil Makers, a brand trusted by home gardeners who value living soils and hands-on soil health. This Soil Re-Amend Kit is a smart upgrade for anyone aiming to maintain vibrant, productive organic soil without replacing media each season.
$40.00
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Flying Skull Flying Skull Flora Extract - 4OZ
Flying Skull Essential Flora Extract is a concentrated, highly-soluble and naturally-steeped additive derived from both land and sea plants. The chemistry behind Essential Flora Extract has been carefully crafted to ensure that other Flying Skull products can be used in conjunction with no adverse chemical reactions.
$6.95
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Cyco Cyco Potash - 5L
Cyco Potash Plus strengthens plants and aids in water retention, which improves yields and transportability. Cyco Potash Plus also makes a positive contribution to the environment by balancing other nutrients, especially nitrate, to make sure they are taken up and used by plants efficiently, avoiding losses that may be harmful to the plant. Cyco Potash Plus will also help in the development of a plant to produce large flowers. Cyco Potash Plus also aids in achieving a full yield and quality. Many of the functions of potash in the plant are related to physiological conditions and stress. These functions are diverse and include efficient nitrogen and improved water use, drought tolerance and frost resistance.
$67.05 $60.35
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Humboldt County's Own Humboldt County's Own Killer Tea - 1 GAL
Clear, clean Golden Yellow product made from pure worm castings and the most potent seabird and bat guanos. No product on the market compares. Not like other teas. Long shelf life, no need to aerate and NO DISGUSTING SMELL. Great for flushing. Watch your flowers pop.
$43.00
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Plagron Plagron Royal Rush - 500ML
Royal Rush is a very powerful fertilizer based on protein hydrolysate.
$72.78 $65.50
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General Hydroponics GH Flora Bloom - 2.5 GAL
Stimulates flower and fruit development. Enhances flavor, aroma, and essential oils. Provides high phosphorous, potassium, magnesium and sulfur.
$98.94 $89.05
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Plagron Plagron Alga Grow - 1L
Alga Grow is a basic plant nutrient that was created especially for soil-based cultivation. Alga Grow is used during the plant's growth phase. This fertiliser, which is based on algae, aids in healthy and balanced growth and good root development. Alga Grow provides a sound foundation for the plant to flower profusely in a subsequent phase.
$39.49
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Cyco Cyco Dr Repair - 5L
Cyco Dr. Repair treats chlorosis and environmental stresses. Chlorosis is a yellowing of leaf tissue due to a lack of chlorophyll. Possible causes of chlorosis include poor drainage, damaged roots, compacted roots, high alkalinity and more importantly nutrient deficiencies in the plant. Environmental stress can damage plant function or its development, which shortens the time for photosynthesis and in turn reduces yield. The lack of iron is one of the more common nutrient deficiencies in plants associated with chlorosis. Dr. Repair helps to restore your plant to its full potential.
$83.12 $74.81
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