Jack's Professional 20-20-20 General Purpose Fertilizer
Best balanced nutrient solution for serious indoor and outdoor gardeners.
Elevate your plant care with Jack's Professional 20-20-20 General Purpose Fertilizer. This 25 lb bag offers a mineral-based, water-soluble concentrate perfect for plants with high nutrient demands. Its balanced 20-20-20 NPK ratio, enriched with essential micronutrients, promotes vigorous growth for a variety of plants, including foliage, garden varieties, and lawns. Designed for continuous liquid feeding, this slow-release formula ensures consistent plant health and vibrant results. A trusted choice for decades, it provides exceptional value and quality for both indoor and outdoor gardening.
$63.99
Owner Satisfaction
4.7
/ 5
Category Rank
22
/ 4425
#22 in Fertilizers
Price vs Category Average
+4%
Above average
NPK Ratio
202020
/ --
Who it's for
- Gardeners managing diverse plant collections with one simple solution
- Commercial growers needing clog-free irrigation and fast nutrient delivery
- Plant enthusiasts seeking to prevent common nutrient deficiencies
Who should skip it
- Specialized growers requiring targeted ratios for fruiting or rooting
- Busy gardeners preferring low-maintenance, slow-release feeding schedules
- Budget-conscious hobbyists looking for basic, entry-level plant food
Performance breakdown
Nutrient Balance
The classic 20-20-20 ratio provides reliable, all-around support for diverse gardens.
Solubility Speed
Dissolves rapidly in water for seamless integration into liquid feeding systems.
Application Versatility
Equally effective for indoor foliage, outdoor vegetables, and expansive lawn areas.
Micronutrient Density
Essential trace elements ensure plants receive a complete, well-rounded nutritional profile.
Feeding Consistency
Formulated for steady, predictable growth during continuous liquid feeding programs.
Value Density
The 25-pound concentrate format offers exceptional longevity for high-volume gardening needs.
Key Specs
NPK Ratio
20-20-20
Form
Water-Soluble Powder
Package Weight
25 lb
Release Type
Slow Release
Season of Use
All Season
Application Method
Drench
Water Soluble
Yes
Pet Child Safe
No
Features
- Balanced 20-20-20 NPK ratio for comprehensive plant nutrition.
- Water-soluble formula for easy and efficient application.
- Contains essential micronutrients for optimal plant health.
- Ideal for heavy-feeding plants and continuous liquid feeding.
- Slow-release concentrate ensures sustained nutrient delivery.
- Versatile for use on foliage, gardens, and lawns.
- Trusted quality and value, used by gardeners for decades.
- Suitable for both indoor and outdoor gardening applications.
What customers say
Customers overwhelmingly praise Jack's Professional 20-20-20 Fertilizer for its exceptional, reliable results across all plant types. Reviewers consistently highlight the balanced NPK ratio as the perfect general feed, leading to noticeable improvements in plant vigor and color. A key advantage is its superior water solubility, ensuring immediate nutrient uptake without residue buildup. Many serious growers consider this a significant upgrade from standard brands, noting its excellent long term value due to concentration. Despite a higher initial cost, the consensus confirms Jack's 20-20-20 as a highly trusted staple for achieving professional grade plant health.
Know before you buy
The 20-20-20 ratio indicates an equal balance of nitrogen, phosphorus, and potassium. This balanced formula provides a complete nutritional profile, making it an excellent all-purpose choice for supporting overall plant health, from leaf development to root strength.
Yes, this formula is highly versatile and safe for both indoor foliage plants and outdoor garden beds. Because it is water-soluble, you can easily adjust the concentration to suit the specific needs of different plant types.
This is a water-soluble concentrate, meaning you must dissolve the powder in water before application. It is specifically designed for liquid feeding programs, allowing you to deliver nutrients directly to the root zone through irrigation or a watering can.
Absolutely. The formula is specifically engineered for heavy feeders that require consistent nutrient availability. Its slow-release properties ensure that plants receive a steady supply of minerals over time rather than a sudden, fleeting spike.
Yes, in addition to the balanced nitrogen, phosphorus, and potassium, this fertilizer is enriched with essential micronutrients. These trace elements are vital for preventing deficiencies and ensuring your plants maintain vibrant, healthy growth.
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