Best Garden Fertilizers Under $100 (2026)
We selected products under $100 based on user ratings, value score combining price and quantity, nutrient delivery method, and suitability across common garden tasks
This roundup covers versatile garden fertilizers under $100 chosen for value, nutrient balance, and user-rated performance. Selections favor products that offer clear application methods (water-soluble, slow-release, liquid, or foliar) and strong user ratings across common garden uses
Top Picks
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1
Miracle-Gro Water Soluble All Purpose Plant Food
Water-soluble plant fertilizer that instantly feeds to promote bigger, more beautiful plants. Praised for quality, value, and simple use with clear instructions
- instant feeding
- versatile for flowers and vegetables
- works with garden feeder or watering can
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2
Osmocote Smart-Release Plant Food 8 lb for flowers & vegetables
Smart-release plant food with 14-14-14 NPK. Promotes strong roots and vigorous above-ground growth. Customers note easy use and slow-release performance
- slow-release formula
- 14-14-14 total nutrient
- includes applicator
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3
FoxFarm liquid fertilizer trio: Tiger Bloom, Grow Big, Big Bloom (3x1 pint)
Liquid nutrient trio to nourish plants across seasons, supporting vegetative growth and flowering. Customers report rapid blooms and easy mixing for hibiscus and hydrangeas
- bloom and growth-focused trio
- easy mixing and usage
- multiple plant benefits
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4
SUPERthrive Plant Vitamin Solution 1 Pint
Concentrated vitamin solution for greenery in home or professional gardens. replenishes soil and supports root development for plants under optimal conditions. Customers note quick visible growth and healthier plants after application
- concentrates vitamins
- promotes root development
- reduces transplant shock
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5
FoxFarm Grow Big Liquid Plant Food for Vegetative Growth
Liquid fertilizer designed to support vegetative growth for flowers, fruits, and vegetables. Helps with size and structure to foster more abundant development, with positive user feedback on growth and ease of use
- vegetative growth focus
- enhanced size and structure
- versatile for indoor/outdoor
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6
FoxFarm Tiger Bloom Liquid Fertilizer Concentrate - 2-8-4 (Quart)
Liquid fertilizer with phosphorus promotes flower, fruit, and bud development. Kickstart growth for vibrant blooms and steady garden vitality. Customers note easy weekly application and strong buds
- high phosphorus formula for blooming
- easy weekly application
- supports roots, foliage, and blooming
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7
Botanicare Cal-Mag Plus calcium, magnesium & iron plant supplement
Cal-Mag Plus plant supplement provides calcium, magnesium, and iron to support healthy growth. Use with every watering or as a spray to correct common deficiencies. Customers note its effectiveness for coco-based soils and ease of use
- nutrient-rich Cal-Mag mix
- easy-to-use with watering
- supports fast-growing plants
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8
Xtreme Gardening Mykos Mycorrhizal Fungi Root Stimulator
Mykos is a mycorrhizal fungi-based root stimulator that expands root systems for better water and nutrient uptake, supporting healthier, more vigorous plants. Customers note strong root development and bigger harvests, especially with shrubs and tomatoes
- boosts root growth for better uptake
- tolerates transplant and drought stress
- positive growth and yield feedback
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9
FloraSeries Hydroponic Nutrient Trio (FloraMicro, FloraBloom, FloraGro) 1 qt
Nutrient system for hydroponics featuring FloraMicro, FloraBloom, and FloraGro to support plant growth at all stages. Customers note easy use, economical gallon sizes, and reliable performance
- multi-nutrient set (Micro, Bloom, Gro)
- hydroponic growth support
- customer-validated performance
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10
General Hydroponics Flora Series 3-Part Nutrient System
Three-part hydroponic nutrient system with FloraMicro, FloraBloom, and FloraGro. Provides nutrients at every growth stage; customers appreciate easy use and effective plant growth
- 3-part nutrient system with three distinct concentrates
- Supports growth from seedling to flowering
- Root-targeted nutrient delivery