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Outdoor Cannabis Fertilizer

Best Outdoor Cannabis Fertilizer

From leading brands and best sellers available on the web.
#1

Winner

FoxFarm Fertilizer Soil Trio Liquid

FoxFarm

FoxFarm Fertilizer Soil Trio Liquid Nutrient: Tiger Bloom, Grow Big, Big Bloom Bottles - (Pack of 3-1 Pint)

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#2
VIVOSUN Liquid Nutrients Base A & B

VIVOSUN

19%OFF

VIVOSUN Liquid Nutrients Base A & B Bundle, Grow Big Hydroponic Fertilizer, Supports Vegetative and Flowering Stages for Outdoor, Indoor Plants, Best Plant Food, Set of Quarts

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#3
Farmer’s Secret Fruit & Bloom Boost

Farmer's Secret

5%OFF

Farmer’s Secret Fruit & Bloom Booster Fertilizer (32oz) - Super Concentrated - Increases Flowering and Yield on All Varieties of Fruits, Vegetables and Flowers

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#4
FoxFarm - Big Bloom Plant Food, Liq

FoxFarm

FoxFarm - Big Bloom Plant Food, Liquid Fertilizer Concentrate for Flowers, Fruits, and Vegetables, All Purpose Plant Fertilizer for Indoor & Outdoor Potted Plants, NPK 0-0.5-0.7 (Pint)

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#5
Botanicare Organicare Bloom - Organ

Botanicare

Botanicare Organicare Bloom - Organic and Natural Granular Fertilizer for the Flowering Stage, 5 lbs.

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Related Products

#6
1L Gold Leaf Liquid Fertilizer Sing

Gold Leaf

1L Gold Leaf Liquid Fertilizer Single-Step Plant Fertilizer with Every Essential Nutrient for Healthy Bigger Buds & Blooms, Optimized pH for Soil, Hydroponics, and Coco Growers

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#7
Humboldts Secret Set of A & B Liqui

Humboldts Secret

20%OFF

Humboldts Secret Set of A & B Liquid Hydroponics Fertilizer - World's Best Nutrient System – Hydroponic Nutrients for Outdoor, Indoor Plants – Supports Vegetative and Flowering Stages of Plants

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#8
GARDENWISE 10-10-10 Fertilizer for

GARDENWISE

10%OFF

GARDENWISE 10-10-10 Fertilizer for All Purpose Plants - Liquid Fertilizer with Seaweed Kelp&Iron - Plant Food Outdoor & Indoor Plant Food, Vegetables, Flowers, Lawn & Garden 10 10 10 Fertilizer 1x8oz

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#9
Humboldts Secret Starter Kit Pack |

Humboldts Secret

10%OFF

Humboldts Secret Starter Kit Pack | Indoor and Outdoor Plant Fertilizer and Hydroponic Nutrients | Base A & B, CalMag and Iron, Golden Tree, Flower Stacker, Plant Enzymes | Complete Garden System

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#10
Foxfarm Soluble Nutrient Trio: Open

FoxFarm

Foxfarm Soluble Nutrient Trio: Open Sesame, Cha Ching & Beastie Bloomz (Pack of 3-6 oz Jars) + Twin Canaries Chart

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Buying Guide for the Best Outdoor Cannabis Fertilizer

Choosing the right outdoor cannabis fertilizer is crucial for ensuring healthy plant growth and maximizing yield. Fertilizers provide essential nutrients that cannabis plants need to thrive, and selecting the right one can make a significant difference in the quality and quantity of your harvest. When picking a fertilizer, consider the specific needs of your plants at different stages of growth, the soil composition, and the environmental conditions. Understanding the key specifications of fertilizers will help you make an informed decision that best suits your gardening goals.
NPK RatioThe NPK ratio represents the proportions of nitrogen (N), phosphorus (P), and potassium (K) in the fertilizer. These are the primary nutrients that cannabis plants need. Nitrogen is essential for leaf growth, phosphorus supports root and flower development, and potassium helps with overall plant health and disease resistance. During the vegetative stage, a higher nitrogen ratio (e.g., 10-5-5) is beneficial, while during the flowering stage, a higher phosphorus and potassium ratio (e.g., 5-10-10) is preferred. Choose a fertilizer with an NPK ratio that matches the growth stage of your plants.
Organic vs. SyntheticFertilizers can be either organic or synthetic. Organic fertilizers are made from natural sources like compost, manure, and bone meal, and they release nutrients slowly, improving soil health over time. Synthetic fertilizers are chemically manufactured and provide nutrients quickly, which can be useful for immediate plant needs. If you prefer a more natural approach and want to enhance soil quality, go for organic fertilizers. If you need quick results and precise nutrient control, synthetic fertilizers might be a better choice.
MicronutrientsIn addition to the primary nutrients (NPK), cannabis plants also require micronutrients such as calcium, magnesium, iron, and zinc. These micronutrients play vital roles in various plant functions, including enzyme activity and chlorophyll production. A deficiency in any of these can lead to poor plant health and reduced yields. Look for fertilizers that include a balanced mix of micronutrients to ensure your plants receive all the necessary elements for optimal growth.
Slow-Release vs. Quick-ReleaseFertilizers can be categorized as slow-release or quick-release based on how they deliver nutrients to the plants. Slow-release fertilizers gradually release nutrients over time, which can reduce the frequency of application and provide a steady supply of nutrients. Quick-release fertilizers provide immediate nutrient availability, which can be beneficial for addressing deficiencies quickly. If you prefer less frequent fertilizing and consistent nutrient supply, choose slow-release fertilizers. If you need to correct nutrient deficiencies rapidly, opt for quick-release fertilizers.
pH CompatibilityThe pH level of the soil affects nutrient availability to cannabis plants. Most cannabis plants thrive in slightly acidic soil with a pH between 6.0 and 7.0. Some fertilizers can alter the soil pH, either making it more acidic or alkaline. It's important to choose a fertilizer that is compatible with the pH level of your soil or one that helps maintain the optimal pH range for cannabis growth. Regularly test your soil pH and adjust your fertilizer choice accordingly to ensure your plants can absorb nutrients effectively.