JACKS CLASSIC - BLOSSOM BOOSTER 1.5lb
Best bloom booster for gardeners seeking vibrant, abundant floral displays.
Elevate your plant's bloom with Jack's Classic Blossom Booster. This professional-grade fertilizer, featuring a 10-30-20 NPK ratio, is expertly formulated to encourage abundant flowers and vibrant colors in all your indoor and outdoor plants. Its proven 1:3:2 ratio of major nutrients, along with essential minor nutrients, feeds your plants from root to leaf. It also promotes robust root growth when used as a transplant solution. Packaged in a durable, water-resistant tub, it includes a measuring spoon and detailed instructions for precise application.
$16.99
Owner Satisfaction
4.6
/ 5
Category Rank
1939
/ 4425
#1939 in Fertilizers
Price vs Category Average
-72%
Below average
NPK Ratio
103020
/ --
Who it's for
- Gardeners seeking vibrant, prolific flower displays
- Plant owners needing fast-acting nutrient absorption
- Serious growers demanding professional-grade, consistent results
Who should skip it
- Novice gardeners prone to over-applying concentrated fertilizers
- Busy hobbyists preferring convenient, ready-to-use liquid feeds
- Indoor gardeners looking for an all-purpose, year-round plant food
Performance breakdown
Bloom stimulation
High phosphorus content drives exceptional flower production and color intensity.
Nutrient solubility
Dissolves quickly for immediate root uptake and rapid plant response.
Application precision
Included measuring spoon ensures accurate dosing for consistent feeding results.
Root development
Doubles as a reliable transplant solution to establish strong root systems.
Packaging durability
Water-resistant tub keeps the powder dry and clump-free in humid environments.
Versatility
Professional-grade formula performs effectively across both indoor and outdoor plant varieties.
Key Specs
NPK Ratio
10-30-20
Package Weight
1.5lb
Packaging
Plastic tub with water resistant label
Nutrient Ratio
Proven 1:3:2 ratio of major plant food elements
Fertilizer Source
Mineral Based
Container Weight
1.5 pounds
Water Soluble
true
Target Plant Type
Flowers, Houseplants
Features
- Professional formula for enhanced blooming
- Encourages more flowers and brighter colors
- Includes beneficial minor nutrients
- Promotes excellent root growth
- Feeds plants from roots to leaves
- Includes measuring spoon for precise application
What customers say
Consumers overwhelmingly trust Jacks Classic Blossom Booster for its reliable quality and impressive results. The most consistent feedback highlights the dramatic increase in bloom size and quantity, often appearing faster than expected. Users appreciate how easily the formula dissolves and applies, making plant feeding a simple, effective routine. This product delivers visible performance, justifying its cost as a high value investment for serious gardeners seeking vibrant flowers.
Know before you buy
This fertilizer has a 10-30-20 NPK ratio. The high middle number, phosphorus, is specifically formulated to trigger and support heavy flower production and vibrant color development.
Yes, Jack's Classic Blossom Booster is safe and effective for both indoor houseplants and outdoor flowering plants. It is designed to be versatile enough for a wide range of floral varieties.
No, this is a quick-release, water-soluble powder. It is designed to be dissolved in water and applied directly to the soil, allowing the plant to absorb the nutrients immediately.
Yes, this formula is excellent for transplanting. Its nutrient profile promotes robust root development, which helps new plants establish themselves more quickly in their new environment.
Yes, each 1.5lb tub comes with a measuring spoon and detailed instructions. This ensures you can mix the correct concentration for your specific plants without needing extra tools.
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$17