Grow Supplies

Grow Supplies

Everything you need to grow organically and build living soil.
From single-ingredient amendments and organic fertilizer blends to microbial inoculants, compost tea ingredients, seeds, supplies, and tools—you’ll find all the essentials to support healthy, regenerative growing.

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Optimize Organics Kelp Meal – organic Ascophyllum nodosum seaweed packed with minerals, auxins, and cytokinins.
1kg Optimize Organics Kelp Meal 1-0-2 – organic seaweed for boosting plant growth, stress resistance, and soil vitality.
Kelp Meal
from $20.00
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Close-up of Optimize Organics Kelp Blend Trio – dry, water-soluble seaweed powder packed with nutrients and plant biostimulants.
500g bag of Optimize Organics Kelp Blend – Laminaria, Sargassum & Ascophyllum for plant vigor, nutrients, and root strength.
Kelp Blend Trio (Soluble Powder)
from $22.00
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11-0-5 Fermented Plant Extract - Granules (High Nitrogen)
11-0-5 Fermented Plant Extract - Granules (High Nitrogen)
from $14.00
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Close-Up of Fish Bone Meal – Wild fish-based fertilizer rich in phosphorus and calcium for organic growing
1kg Fish Bone Meal – Organic slow-release fertilizer for flowers, fruits, and root development
Fish Bone Meal 6-16-0
from $14.00
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Fish Bone Granules
Fish Bone Granules
from $15.00
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Black Soldier Fly Frass Granules 2kg bag – chitin-rich 3-2-2 insect fertilizer for gardens and containers
Close-up of Black Soldier Fly Frass granules texture – natural insect-based fertilizer for soil health
Black Soldier Fly Frass 3-2-2 (Granules)
from $18.00
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Close-up of Optimize Organics Black Soldier Fly Frass – natural insect-based fertilizer with nitrogen, chitin, and beneficial microbes.
7.5kg Black Soldier Fly Frass from Optimize Organics – sustainable fertilizer to improve soil biology, root strength, and resilience.
Black Soldier Fly Frass 3-2-2 (Fine Grade)
from $13.00
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Close-up of Optimize Organics Mineralized Phosphate 0-9-0 – finely ground mineral powder for phosphorus and calcium nutrition.
1kg Mineralized Phosphate 0-9-0 by Optimize Organics – natural powdered phosphorus and calcium for garden use.
Mineralized Phosphate 0-9-0
from $14.00
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Close-up of Optimize Organics Oyster Shell Flour – natural calcium amendment for boosting soil health and balancing pH levels.
2kg bag of Oyster Shell Flour by Optimize Organics – slow-release calcium for soil pH balance and strong plant growth.
Oyster Shell Flour 36% Ca
from $14.00
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Humic Acid Being Mixed – Fine humic acid powder dissolving in water for easy soil and foliar application
Close-Up of Humic Acid Powder – Rich-colored organic humic powder for boosting soil and plant health
Humic Acid Powder - Soluble
from $17.00
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Optimize Organics' Humic Acid Granules: 64% humic, 3% fulvic acid. Enhances nutrient uptake, boosts yields & improves soil structure & water retention.
2KG Bag of Optimize Organics' Humic Acid Granules: 64% humic, 3% fulvic acid. Enhances nutrient uptake, boosts yields & improves soil structure & water retention.
Humic Acid (Granules)
from $11.00
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Close-Up of Volcanic Basalt Rock Dust – Fine, mineral-rich basalt powder for soil building and healthy plant growth
1kg Volcanic Basalt Rock Dust – Fine rock dust to boost soil health, root growth, and trace mineral availability
Volcanic Rock Dust (Basalt)
from $13.00
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Micronized Soft Rock Phosphate Powder – Fine, water-suspendable Cal-Phos powder for soil and foliar applications
1kg Micronized Soft Rock Phosphate – Fine Cal-Phos powder to support root growth and increase phosphorus availability
Micronized Soft Rock Phosphate (Cal-Phos)
from $21.00
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Close-Up of Glacial Rock Dust – Fine, flour-like texture of mineral-rich powder for soil and compost amendment
1kg Glacial Rock Dust – Fine mineral powder to boost soil health, plant nutrition, and microbial activity
Glacial Rock Dust
from $8.00
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Close-up of Azomite micronized powder – fine volcanic mineral dust packed with trace elements for soil and plant vitality.
1kg Azomite Micronized – fine mineral powder packed with 70+ trace elements to support soil health and plant nutrition
Azomite - Rock Dust
from $11.00
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Close-Up of Dolomite Lime Granules – Uniform granules made from finely ground limestone for easy soil application
1kg Granulated Dolomite Lime – Raises soil pH and adds calcium and magnesium for garden, lawn, and soil health
Dolomite Lime (Granules)
from $10.00
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Optimize Organics' Limestone Granules: 34% calcium, 88% calcium carbonate. Raises soil pH, boosts nutrient efficiency & improves soil health.
2KG Bag of Optimize Organics' Limestone Granules: 34% calcium, 88% calcium carbonate. Raises soil pH, boosts nutrient efficiency & improves soil health.
Limestone (Granules)
from $10.00
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Optimize Organics' Gypsum Granules: 22% calcium, 14% sulfur. Enhances soil structure, water retention & nutrient availability for healthier crops.
2KG Bag of Optimize Organics' Gypsum Granules: 22% calcium, 14% sulfur. Enhances soil structure, water retention & nutrient availability for healthier crops.
Gypsum Granules
from $10.00
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Optimize Organics' Rock Phosphate Granular 0-7-0: slow-release phosphorus for root growth, flowering & fruiting. Easy application & organic-certified.
2KG Bag of Optimize Organics' Rock Phosphate Granular 0-7-0: slow-release phosphorus for root growth, flowering & fruiting. Easy application & organic-certified.
Rock Phosphate Granular 0-7-0
from $11.00
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1kg bag of dolomite lime sandy powder for fast-acting soil pH correction – 20% calcium, 10% magnesium, 90% CCE
Close-up image of dolomite lime powder.
Dolomite Lime (Powder)
from $10.00
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Close-Up of Micronized Greensand Powder – Fine glauconite powder packed with potassium, iron, and trace minerals.
1kg Micronized Greensand – Fine mineral powder to improve soil structure and provide slow-release nutrients.
Micronized Greensand
from $16.00
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Optimize Organics' Manganese Sulfate 32%: fast-acting micronutrient to correct deficiencies, enhance photosynthesis & improve stress tolerance.
2KG Bag of Optimize Organics' Manganese Sulfate 32%: fast-acting micronutrient to correct deficiencies, enhance photosynthesis & improve stress tolerance.
Manganese Sulfate 32% (Mn)
from $17.00
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Sul-Po-Mag (Langbeinite) Granules
Sul-Po-Mag (Langbeinite) Granules
from $11.00
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Optimize Organics' SUL-PO-MAG Crystals: 22% potassium, 11% magnesium, 22% sulfur. Organic mineral fertilizer for gardens, containers & soil premixing.
2KG Bag of Optimize Organics' SUL-PO-MAG Crystals: 22% potassium, 11% magnesium, 22% sulfur. Organic mineral fertilizer for gardens, containers & soil premixing.
Sul-Po-Mag (Langbeinite) Crystals
from $15.00
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Optimize Organics' Elemental Boron 20.5%: water-soluble boron to correct deficiencies, boost flower & fruit development, and support plant health.
1KG Bag of Optimize Organics' Elemental Boron 20.5%: water-soluble boron to correct deficiencies, boost flower & fruit development, and support plant health.
Elemental Boron
from $12.00
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Optimize Organics' Ferrous Sulfate: 20% iron, 12% sulfur. Corrects iron chlorosis, boosts chlorophyll & reduces soil alkalinity for gardens & crops.
2KG Bag of Optimize Organics' Ferrous Sulfate: 20% iron, 12% sulfur. Corrects iron chlorosis, boosts chlorophyll & reduces soil alkalinity for gardens & crops.
Iron - Ferrous Sulfate 20%
from $12.00
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Copper Sulfate 25% (FEED GRADE)
Copper Sulfate 25% (FEED GRADE)
from $19.00
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Image shows a white powder. Powder is a close-up of Optimize Organics' L-Phenylalanine powder for organic growing. Low-dose amino support for drenches, teas or light foliar in veg–mid flower.
2KG Bag of Optimize Organics' Zinc Sulfate 35.5%: fast-acting zinc source to correct deficiencies, boost enzyme activity, improve growth & disease resistance.
Zinc Sulfate 35.5% (Zn)
from $14.00
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Optimize Organics' Sulfur Granules 90%: elemental sulfur to lower soil pH, correct alkaline soils & support sulfur-oxidizing bacteria. Organic-certified.
2KG Bag of Optimize Organics' Sulfur Granules 90%: elemental sulfur to lower soil pH, correct alkaline soils & support sulfur-oxidizing bacteria. Organic-certified.
Sulfur Granules 90% (S)
from $12.00
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Optimize Organics' Potassium Sulfate Solution Grade: 52% potash, 18% sulfate. Water-soluble, low-salinity fertilizer for high-potassium crops.
2KG Bag of Optimize Organics' Potassium Sulfate Solution Grade: 52% potash, 18% sulfate. Water-soluble, low-salinity fertilizer for high-potassium crops.
Potassium Sulfate Solution Grade
from $15.00
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Optimize Organics' Magnesium Sulfate: 9.8% magnesium, 13% sulfur. Supports chlorophyll production, nutrient absorption & flower and fruit development.
2KG Bag of Optimize Organics' Magnesium Sulfate: 9.8% magnesium, 13% sulfur. Supports chlorophyll production, nutrient absorption & flower and fruit development.
Magnesium Sulfate (Epsom Salts)
from $11.00
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Close-Up of Gypsum Powder – Fine, highly soluble gypsum powder for fast calcium and sulfur delivery to plants
1kg Gypsum Solution Grade – Water-soluble calcium and sulfur powder to improve soil health and plant nutrition
Gypsum Solution Grade
from $10.00
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Optimize Organics' Potassium Sulfate 0-0-52: 52% potassium, 18% sulfur. Enhances fruit & vegetable growth with low salinity. Organic-certified.
2KG Bag of Optimize Organics' Potassium Sulfate 0-0-52: 52% potassium, 18% sulfur. Enhances fruit & vegetable growth with low salinity. Organic-certified.
Potassium Sulfate 0-0-52
from $14.00
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High-purity soluble molybdenum for foliar and fertigation use. Supports nitrogen metabolism, enzyme activity, and micronutrient balance in crops.
2KG Bag of Optimize Organics' Citric Acid (Non-GMO): food-grade acidulant for pH adjustment, preservation & cleaning. Organic-certified for multiple applications.
Citric Acid (Non-GMO)
from $25.00
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2KG Bag of Optimize Organics' Potassium Bicarbonate (Food Grade): pH UP solution that regulates soil acidity, boosts nutrient absorption & enhances plant growth.
Potassium Bicarbonate (Food Grade)
from $12.00
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Barley Seed- Sprout For Enzyme Drench
Barley Seed- Sprout For Enzyme Drench
from $15.00
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Alfalfa Seed - Sprout For Enzyme Drench
Alfalfa Seed - Sprout For Enzyme Drench
$18.00
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Purple Barley Seed - Sprout For Enzyme Drench
Purple Barley Seed - Sprout For Enzyme Drench
$16.00
Currently Unavailable
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Malted Barley Seed - Pre-Sprouted & Kiln Dried
Malted Barley Seed - Pre-Sprouted & Kiln Dried
$11.00
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Corn Seed - Sprout For Enzyme Drench
Corn Seed - Sprout For Enzyme Drench
from $19.00
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Close-up of screened horticultural pumice—light, airy texture perfect for soil drainage and long-term aeration.
Hand holding pumice stone—porous and lightweight, ideal for mixing into soil to boost airflow and prevent overwatering.
Pumice Stone (3-12mm)
from $12.00
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Coarse Perlite is a natural, sterile soil amendment that improves aeration, drainage, and prevents compaction. Ideal for gardening, propagation, and hydroponics. Neutral pH and organic-compliant in Canada.
Coarse Perlite
Coarse Perlite
from $10.00
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Optimize Organics' Medium Perlite: lightweight volcanic mineral that enhances aeration, drainage & root growth. Ideal for gardening & hydroponics.
Medium Perlite
Medium Perlite
from $10.00
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Close-Up of Coconut Coir Fiber – Fine, springy brown fiber for improving soil structure and root health
4L Coconut Coir Fiber – Sustainable peat moss alternative for moisture retention and healthy root development
Coconut Coir Fiber
from $12.00
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Optimize Organics coconut husk chips are a sustainable soil amendment for aeration, moisture retention, and root health in indoor and outdoor plants.
25L bag of Optimize Organics coconut husk chips are a sustainable soil amendment for aeration, moisture retention, and root health in indoor and outdoor plants.
Coconut Husk Chips
from $13.00
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Optimize Organics mini LECA pebbles are very small porous expanded clay balls that improve aeration, drainage, and root health in hydroponic and soil-based plant systems.
8L bag of Optimize Organics mini LECA pebbles are very small porous expanded clay balls that improve aeration, drainage, and root health in hydroponic and soil-based plant systems.
Mini Leca Pebbles
from $19.00
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Optimize Organics LECA Pebbles are 10-20mm expanded clay balls for improved aeration, drainage, and root health in hydroponic and soil-based plant systems.
8L bag of Optimize Organics LECA Pebbles are 10-20mm expanded clay balls for improved aeration, drainage, and root health in hydroponic and soil-based plant systems.
Leca Pebbles (10–20mm)
from $13.00
Currently Unavailable
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Optimize Organics' Geolite Pebbles: lightweight, porous clay aggregates for aeration, drainage, hydroponics, aquaponics, and healthy root growth.
A close up of balls in hand showing the size and texture of these geolite balls.
Geolite Pebbles
from $12.00